公开(公告)号：US20110218376A1

公开(公告)日：2011-09-08

申请号：US13119333

申请日：2009-09-16

申请人： Yasutoshi Iguchi ,  Tatsuo Hamamatsu ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

发明人： Yasutoshi Iguchi ,  Tatsuo Hamamatsu ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

IPC分类号： C07C1/207

CPC分类号： C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G45/04 ,  C10G45/06 ,  C10G45/08 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2300/207 ,  C10G2300/4006 ,  C10G2300/4012 ,  C10G2300/4081 ,  C10G2300/70 ,  C10G2400/02 ,  C10G2400/04 ,  C10G2400/08 ,  Y02P30/20

摘要： The method for manufacturing a hydrocarbon oil of the present invention comprises a first step wherein a plurality of reaction zones filled with a specific catalyst is disposed in series and a feedstock oil containing an oxygen-containing hydrocarbon compound derived from an animal or vegetable oil is supplied and hydrotreated under the conditions of a hydrogen pressure of 1 MPa or more and 10 MPa or less in each of the reaction zones; and a second step wherein hydrogen, hydrogen sulfide, carbon dioxide and water are removed from a product to be treated obtained in the first step to obtain a hydrocarbon oil. Among the plurality of reaction zones, the inlet temperature of the reaction zone disposed on the most upstream side is 150° C. or more and 250° C. or less, the inlet temperature of the second most upstream reaction zone or below is equal to or higher than the condensation temperature of water, and the outlet temperature of the reaction zone disposed on the most downstream side is 260° C. or more and 360° C. or less. The feedstock oil comprises a recycled oil containing a specific amount of a part of the hydrocarbon oil obtained in the second step and a specific amount of a sulfur-containing hydrocarbon compound.

摘要翻译： 本发明的烃油的制造方法包括第一步骤，其中填充有特定催化剂的多个反应区域串联设置，并且供给含有源自动物或植物油的含氧烃化合物的原料油 并在每个反应区中在氢气压力为1MPa以上且10MPa以下的条件下进行加氢处理; 第二步骤，从第一步骤中得到的待处理产物中除去氢，硫化氢，二氧化碳和水，得到烃油。 在多个反应区域中，设置在最上游侧的反应区域的入口温度为150℃以上且250℃以下，第二上游反应区域以下的入口温度等于 或高于水的冷凝温度，并且设置在最下游侧的反应区的出口温度为260℃以上且360℃以下。 原料油包含含有特定量的第二步获得的一部分烃油的再循环油和特定量的含硫烃化合物。

公开(公告)号：US08784645B2

公开(公告)日：2014-07-22

申请号：US13119333

申请日：2009-09-16

申请人： Yasutoshi Iguchi ,  Tatsuo Hamamatsu ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

发明人： Yasutoshi Iguchi ,  Tatsuo Hamamatsu ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

IPC分类号： C10G3/00 ,  C10G65/02 ,  C10G65/04

CPC分类号： C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G45/04 ,  C10G45/06 ,  C10G45/08 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2300/207 ,  C10G2300/4006 ,  C10G2300/4012 ,  C10G2300/4081 ,  C10G2300/70 ,  C10G2400/02 ,  C10G2400/04 ,  C10G2400/08 ,  Y02P30/20

摘要： The method for manufacturing a hydrocarbon oil of the present invention comprises a first step wherein a plurality of reaction zones filled with a specific catalyst is disposed in series and a feedstock oil containing an oxygen-containing hydrocarbon compound derived from an animal or vegetable oil is supplied and hydrotreated under the conditions of a hydrogen pressure of 1 MPa or more and 10 MPa or less in each of the reaction zones; and a second step wherein hydrogen, hydrogen sulfide, carbon dioxide and water are removed from a product to be treated obtained in the first step to obtain a hydrocarbon oil. Among the plurality of reaction zones, the inlet temperature of the reaction zone disposed on the most upstream side is 150° C. or more and 250° C. or less, the inlet temperature of the second most upstream reaction zone or below is equal to or higher than the condensation temperature of water, and the outlet temperature of the reaction zone disposed on the most downstream side is 260° C. or more and 360° C. or less. The feedstock oil comprises a recycled oil containing a specific amount of a part of the hydrocarbon oil obtained in the second step and a specific amount of a sulfur-containing hydrocarbon compound.

摘要翻译： 本发明的烃油的制造方法包括第一步骤，其中填充有特定催化剂的多个反应区域串联设置，并且供给含有源自动物或植物油的含氧烃化合物的原料油 并在每个反应区中在氢气压力为1MPa以上且10MPa以下的条件下进行加氢处理; 第二步骤，从第一步骤中得到的待处理产物中除去氢，硫化氢，二氧化碳和水，得到烃油。 在多个反应区域中，设置在最上游侧的反应区域的入口温度为150℃以上且250℃以下，第二上游反应区域以下的入口温度等于 或高于水的冷凝温度，并且设置在最下游侧的反应区的出口温度为260℃以上且360℃以下。 原料油包含含有特定量的第二步获得的一部分烃油的再循环油和特定量的含硫烃化合物。

公开(公告)号：US20110237853A1

公开(公告)日：2011-09-29

申请号：US13119310

申请日：2009-09-16

申请人： Tatsuo Hamamatsu ,  Hideki Ono ,  Yasutoshi Iguchi ,  Hideshi Iki ,  Yoshihiko Kinoshita

发明人： Tatsuo Hamamatsu ,  Hideki Ono ,  Yasutoshi Iguchi ,  Hideshi Iki ,  Yoshihiko Kinoshita

IPC分类号： C10G1/00

CPC分类号： C10G45/02 ,  C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2300/4018 ,  Y02P30/20

摘要： A method for manufacturing a hydrocarbon oil, comprising: a first step wherein a feedstock oil containing an oxygen-containing organic compound and a water-insoluble chlorine-containing compound is brought into contact with a hydrogenation catalyst comprising a support containing a porous inorganic oxide and one or more metals selected from Group VIA and Group VIII of the periodic table supported on the support in the presence of hydrogen to generate a hydrocarbon oil and water in a vapor state by the hydrodeoxygenation of an oxygen-containing organic compound and convert the water-insoluble chlorine-containing compound into a water-soluble chlorine-containing compound; a second step wherein the water in the reaction product of the first step is maintained in a vapor state and the reaction product of the first step is brought into contact with a nitrogen-containing Brønsted base compound which has a boiling point at normal pressure of 100° C. or less and is water-soluble to obtain a product to be treated; and a third step wherein the product to be treated is cooled to a temperature not higher than the temperature at which water in a vapor state is liquefied to form an aqueous phase containing a water-soluble chlorine-containing compound and a nitrogen-containing Brønsted base compound and then separate the aqueous phase from an oil to be treated to obtain a product oil containing a hydrocarbon oil.

摘要翻译： 一种烃油的制造方法，包括：第一工序，其中含有含氧有机化合物的原料油和不溶于水的含氯化合物与含有多孔无机氧化物的载体的氢化催化剂接触， 选自元素周期表第VIA族和第VIII族的一种或多种金属在氢气存在下负载在载体上以通过含氧有机化合物的加氢脱氧产生烃油和蒸气状态的水， 不溶性含氯化合物变成水溶性含氯化合物; 第二步骤，其中第一步骤的反应产物中的水保持蒸气状态，并使第一步的反应产物与常压下的沸点为100的含氮布朗斯台德碱化合物接触 ℃或更低，并且是水溶性的，以获得待处理的产品; 以及第三步骤，其中待处理的产品被冷却到不高于蒸汽状态的水液化的温度的温度，以形成含有水溶性含氯化合物和含氮布朗斯台德碱的水相 化合物，然后将水相与待处理的油分离，得到含有烃油的产物油。

公开(公告)号：US08551325B2

公开(公告)日：2013-10-08

申请号：US13119310

申请日：2009-09-16

申请人： Tatsuo Hamamatsu ,  Hideki Ono ,  Yasutoshi Iguchi ,  Hideshi Iki ,  Yoshihiko Kinoshita

发明人： Tatsuo Hamamatsu ,  Hideki Ono ,  Yasutoshi Iguchi ,  Hideshi Iki ,  Yoshihiko Kinoshita

IPC分类号： C10G45/02 ,  C07C1/20

CPC分类号： C10G45/02 ,  C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2300/4018 ,  Y02P30/20

摘要： A method for manufacturing a hydrocarbon oil, comprising: a first step wherein a feedstock oil containing an oxygen-containing organic compound and a water-insoluble chlorine-containing compound is brought into contact with a hydrogenation catalyst comprising a support containing a porous inorganic oxide and one or more metals selected from Group VIA and Group VIII of the periodic table supported on the support in the presence of hydrogen to generate a hydrocarbon oil and water in a vapor state by the hydrodeoxygenation of an oxygen-containing organic compound and convert the water-insoluble chlorine-containing compound into a water-soluble chlorine-containing compound; a second step wherein the water in the reaction product of the first step is maintained in a vapor state and the reaction product of the first step is brought into contact with a nitrogen-containing Brønsted base compound which has a boiling point at normal pressure of 100° C. or less and is water-soluble to obtain a product to be treated; and a third step wherein the product to be treated is cooled to a temperature not higher than the temperature at which water in a vapor state is liquefied to form an aqueous phase containing a water-soluble chlorine-containing compound and a nitrogen-containing Brønsted base compound and then separate the aqueous phase from an oil to be treated to obtain a product oil containing a hydrocarbon oil.

摘要翻译： 一种烃油的制造方法，包括：第一工序，其中含有含氧有机化合物的原料油和不溶于水的含氯化合物与含有多孔无机氧化物的载体的氢化催化剂接触， 选自元素周期表第VIA族和第VIII族的一种或多种金属在氢气存在下负载在载体上以通过含氧有机化合物的加氢脱氧产生烃油和蒸气状态的水， 不溶性含氯化合物变成水溶性含氯化合物; 第二步骤，其中第一步骤的反应产物中的水保持蒸气状态，并使第一步的反应产物与常压下的沸点为100的含氮布朗斯台德碱化合物接触 ℃或更低，并且是水溶性的，以获得待处理的产品; 以及第三步骤，其中待处理的产品被冷却到不高于蒸汽状态的水液化的温度的温度，以形成含有水溶性含氯化合物和含氮布朗斯台德碱 化合物，然后将水相与待处理的油分离，得到含有烃油的产物油。

公开(公告)号：US20120216449A1

公开(公告)日：2012-08-30

申请号：US13391727

申请日：2010-08-30

申请人： Kazuaki Hayasaka ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

发明人： Kazuaki Hayasaka ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

IPC分类号： C10L1/188

CPC分类号： B01J29/7484 ,  B01J23/85 ,  B01J23/883 ,  B01J29/7461 ,  B01J29/7492 ,  B01J29/85 ,  C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G45/64 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2400/08 ,  C10L1/04 ,  Y02P30/20

摘要： A method for producing an aviation fuel oil base includes obtaining a first generated oil by hydrotreating a feedstock by bringing a feedstock which includes an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat into contact with a first dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of group 6A of the periodic table, a metal of group 8, and an amorphous solid acidic substance, in the presence of hydrogen; and obtaining a second generated oil including an aviation fuel oil base by hydroisomerizing the first generated oil by bringing the first generated oil into contact with a second dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of the group 8 of the periodic table and a crystalline solid acidic substance, in the presence of hydrogen.

摘要翻译： 一种航空燃料油基料的制造方法，其特征在于，通过使来自动物或植物油脂的含氧烃化合物的原料与第一双官能催化剂接触而进行加氢处理，得到第一产生油， 脱氢和氢化功能，其包括周期表第6A族金属，第8族金属和无定形固体酸性物质，在氢的存在下; 以及通过使第一产生的油与具有脱氢和氢化功能的第二双功能催化剂接触来获得包含航空燃料油基的第二产生的油，该第二双功能催化剂包括周期性的第8族金属 表和结晶固体酸性物质，在氢的存在下。

公开(公告)号：US09283552B2

公开(公告)日：2016-03-15

申请号：US13391727

申请日：2010-08-30

申请人： Kazuaki Hayasaka ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

发明人： Kazuaki Hayasaka ,  Hideki Ono ,  Akira Koyama ,  Hideshi Iki

IPC分类号： C07C1/00 ,  B01J29/74 ,  B01J23/883 ,  C10G3/00 ,  C10G45/64 ,  C10L1/04 ,  B01J23/85 ,  B01J29/85

CPC分类号： B01J29/7484 ,  B01J23/85 ,  B01J23/883 ,  B01J29/7461 ,  B01J29/7492 ,  B01J29/85 ,  C10G3/46 ,  C10G3/49 ,  C10G3/50 ,  C10G45/64 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2400/08 ,  C10L1/04 ,  Y02P30/20

摘要： A method for producing an aviation fuel oil base, including: a first step of obtaining a first generated oil by hydrotreating a feedstock by bringing a feedstock which includes an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat into contact with a first dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of group 6B of the periodic table, a metal of group 8, and an amorphous solid acidic substance, in the presence of hydrogen; and a second step of obtaining a second generated oil including an aviation fuel oil base by hydroisomerizing the first generated oil by bringing the first generated oil into contact with a second dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of the group 8 of the periodic table and a crystalline solid acidic substance, in the presence of hydrogen.

摘要翻译： 一种生产航空燃料油基料的方法，包括：第一步骤，通过将包含来源于动物或植物油脂的含氧烃化合物的原料与一种原料接触而将原料加氢处理获得第一产生的油 具有脱氢和氢化功能的第一双官能催化剂，其包含周期表第6B族金属，第8族金属和无定形固体酸性物质，在氢的存在下; 以及第二步骤，通过使第一产生的油与具有脱氢和氢化功能的第二双功能催化剂接触，并且包括该组的金属，获得包含航空燃料油基的第二产生的油， 8和结晶固体酸性物质，在氢的存在下。

公开(公告)号：US20120209038A1

公开(公告)日：2012-08-16

申请号：US13391765

申请日：2010-08-30

申请人： Yasutoshi Iguchi ,  Hideki Ono ,  Akira Koyama

发明人： Yasutoshi Iguchi ,  Hideki Ono ,  Akira Koyama

IPC分类号： C10L1/16

CPC分类号： C10G3/50 ,  C10G3/46 ,  C10G3/49 ,  C10G45/58 ,  C10G65/043 ,  C10G2300/1014 ,  C10G2300/1018 ,  C10G2300/202 ,  C10G2300/30 ,  C10G2300/301 ,  C10G2300/4018 ,  C10G2300/80 ,  C10G2400/08 ,  C10L1/04 ,  C10L2200/043 ,  C10L2200/0461 ,  C10L2270/04 ,  C10L2290/10 ,  Y02P30/10 ,  Y02P30/20

摘要： The aviation fuel oil base of the present invention is obtained by hydrotreating an oil to be treated containing an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat and a sulfur-containing hydrocarbon compound and then hydroisomerizing the resultant hydrotreated oil, wherein a yield of a fraction having a boiling range of 140 to 300° C. is 70 mass % or more; an isoparaffin content is 80 mass % or more; a content of isoparaffin having 2 or more branches is 17 mass % or more; an aromatic content is less than 0.1 vol %; an olefin content is less than 0.1 vol %; a sulfur content is less than 1 mass ppm; and an oxygen content is less than 0.1 mass %.

摘要翻译： 本发明的航空燃料油基质是通过加氢处理含有来源于动植物油脂和含硫烃化合物的含氧烃化合物的待处理油，然后将得到的加氢处理油加氢异构化得到的，其中 沸点140〜300℃的馏分的产率为70质量％以上， 异链烷烃含量为80质量％以上; 具有2个以上分支的异链烷烃的含量为17质量％以上; 芳族含量小于0.1体积％; 烯烃含量小于0.1vol％; 硫含量小于1质量ppm; 氧含量小于0.1质量％。

公开(公告)号：US20120217186A1

公开(公告)日：2012-08-30

申请号：US13391067

申请日：2010-08-06

申请人： Kazuaki Hayasaka ,  Hideki Ono ,  Yoshiyuki Nagayasu ,  Masahiro Taguchi ,  Hideshi Iki

发明人： Kazuaki Hayasaka ,  Hideki Ono ,  Yoshiyuki Nagayasu ,  Masahiro Taguchi ,  Hideshi Iki

IPC分类号： C10G73/38

CPC分类号： C10G65/02 ,  B01J21/066 ,  B01J23/85 ,  B01J23/882 ,  B01J23/883 ,  B01J23/888 ,  B01J29/7484 ,  B01J35/002 ,  B01J35/1061 ,  B01J35/108 ,  B01J37/0009 ,  B01J37/03 ,  C10G45/58 ,  C10G45/60 ,  C10G45/62 ,  C10G45/64 ,  C10G65/043 ,  C10G2300/1022 ,  C10G2300/107 ,  C10G2300/1074 ,  C10G2300/1077 ,  C10G2300/202 ,  C10G2300/301 ,  C10G2300/302 ,  C10G2300/304 ,  C10G2400/10 ,  C10M101/02 ,  C10M2203/1025 ,  C10M2205/173 ,  C10N2220/026 ,  C10N2220/027 ,  C10N2220/028 ,  C10N2220/031 ,  C10N2230/02 ,  C10N2230/10 ,  C10N2230/43 ,  C10N2240/10 ,  C10N2270/00 ,  C10N2220/022

摘要： A method for producing a lubricant base oil includes contacting feedstock containing normal paraffins having not less than 20 carbon atoms with a first catalyst in the presence of molecular hydrogen to obtain a first produced oil, and contacting the first produced oil with a second catalyst in the presence of molecular hydrogen to obtain a second produced oil. The first catalyst includes a first carrier in which a fraction of an amount of NH3 to be desorbed at 300 to 800° C. based on a total amount of NH3 to be desorbed is 80 to 90% in temperature-programmed desorption of NH3, a first metal selected from metals of Group VI in the periodic table carried on the first carrier, and a second metal selected from metals of Group VIII to Group X in the periodic table carried on the first carrier.

摘要翻译： 一种润滑剂基础油的制造方法，其特征在于，在分子氢存在下，使含有不少于20个碳原子的正链烷烃的原料与第一催化剂接触，得到第一生产油，并将第一生产油与第二催化剂接触 存在分子氢以获得第二产生的油。 第一催化剂包括第一载体，其中在待处理的NH 3的总量的300至800℃下解吸的一部分NH 3的一部分在NH 3的温度程序解吸中为80至90％，a 选自在第一载体上承载的周期表中的VI族的金属的第一种金属和选自第一载体上的周期表中的VIII族至第X族的金属的第二种金属。

公开(公告)号：US09057026B2

公开(公告)日：2015-06-16

申请号：US13391067

申请日：2010-08-06

申请人： Kazuaki Hayasaka ,  Hideki Ono ,  Yoshiyuki Nagayasu ,  Masahiro Taguchi ,  Hideshi Iki

发明人： Kazuaki Hayasaka ,  Hideki Ono ,  Yoshiyuki Nagayasu ,  Masahiro Taguchi ,  Hideshi Iki

IPC分类号： C10G73/38 ,  C10G65/02 ,  B01J21/06 ,  B01J23/85 ,  B01J23/882 ,  B01J23/883 ,  B01J23/888 ,  B01J35/00 ,  B01J35/10 ,  B01J37/00 ,  B01J37/03 ,  C10G45/58 ,  C10G45/60 ,  C10G45/62 ,  C10G45/64 ,  C10G65/04 ,  C10G73/00 ,  C10M101/02 ,  B01J29/74

CPC分类号： C10G65/02 ,  B01J21/066 ,  B01J23/85 ,  B01J23/882 ,  B01J23/883 ,  B01J23/888 ,  B01J29/7484 ,  B01J35/002 ,  B01J35/1061 ,  B01J35/108 ,  B01J37/0009 ,  B01J37/03 ,  C10G45/58 ,  C10G45/60 ,  C10G45/62 ,  C10G45/64 ,  C10G65/043 ,  C10G2300/1022 ,  C10G2300/107 ,  C10G2300/1074 ,  C10G2300/1077 ,  C10G2300/202 ,  C10G2300/301 ,  C10G2300/302 ,  C10G2300/304 ,  C10G2400/10 ,  C10M101/02 ,  C10M2203/1025 ,  C10M2205/173 ,  C10N2220/026 ,  C10N2220/027 ,  C10N2220/028 ,  C10N2220/031 ,  C10N2230/02 ,  C10N2230/10 ,  C10N2230/43 ,  C10N2240/10 ,  C10N2270/00 ,  C10N2220/022

摘要： A method for producing a lubricant base oil includes contacting feedstock containing normal paraffins having not less than 20 carbon atoms with a first catalyst in the presence of molecular hydrogen to obtain a first produced oil, and contacting the first produced oil with a second catalyst in the presence of molecular hydrogen to obtain a second produced oil. The first catalyst includes a first carrier in which a fraction of an amount of NH3 to be desorbed at 300 to 800° C. based on a total amount of NH3 to be desorbed is 80 to 90% in temperature-programmed desorption of NH3, a first metal selected from metals of Group VI in the periodic table carried on the first carrier, and a second metal selected from metals of Group VIII to Group X in the periodic table carried on the first carrier.

摘要翻译： 一种润滑剂基础油的制造方法，其特征在于，在分子氢存在下，使含有不少于20个碳原子的正链烷烃的原料与第一催化剂接触，得到第一生产油，并将第一生产油与第二催化剂接触 存在分子氢以获得第二产生的油。 第一催化剂包括第一载体，其中在待处理的NH 3的总量的300至800℃下解吸的一部分NH 3的一部分在NH 3的温度程序解吸中为80至90％，a 选自在第一载体上承载的周期表中的VI族的金属的第一种金属和选自第一载体上的周期表中的VIII族至第X族的金属的第二种金属。

公开(公告)号：US09011084B2

公开(公告)日：2015-04-21

申请号：US13231860

申请日：2011-09-13

申请人： Hideki Ono ,  Kenichi Murata ,  Shigeki Senoo ,  Goingwon Lee

发明人： Hideki Ono ,  Kenichi Murata ,  Shigeki Senoo ,  Goingwon Lee

IPC分类号： F01D9/02 ,  F01D5/14

CPC分类号： F01D5/141 ,  F05D2220/31 ,  F05D2240/121 ,  F05D2240/122 ,  F05D2250/711 ,  F05D2250/713

摘要： Suppressing profile loss of a moving blade due to radial flow without an increase in the length of a shaft of a turbine is disclosed. The degree of reaction on an inner circumferential side is set to an appropriate degree, reducing profile loss due to supersonic inflow, and improving turbine efficiency. A steam turbine stator vane has a trailing edge with a curved line when the stator vane is viewed from a downstream side in the axial direction. The curved line has an inflection point located on an outer circumferential side with respect to the center of the stator vane in the height direction of the stator vane. An inner circumferential portion of the curved line is located on the inner circumferential side with respect to the inflection point. An outer circumferential portion of the curved line is located on the outer circumferential side with respect to the inflection point.

摘要翻译： 公开了由于径向流动而不增加涡轮轴的长度而增加动叶片的轮廓损失。 将内周侧的反应度设定在适当的程度，减少由于超音速流入造成的轮廓损失，提高涡轮效率。 当从轴向的下游侧观察定子叶片时，汽轮机定子叶片具有带有曲线的后缘。 曲线具有相对于定子叶片的中心在定子叶片的高度方向上的外周侧上的拐点。 曲线的内周部相对于拐点位于内周侧。 曲线的外周部相对于拐点位于外周侧。