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公开(公告)号：US07565269B2
公开(公告)日：2009-07-21
申请号：US11802507
申请日：2007-05-23
摘要： To determine free field thrust of a gas turbine engine, the gas turbine engine may be attached to a movable support, and operated at a selected engine operating point. The thrust applied by the engine to the thrust cradle is measured. The gas turbine engine intake momentum drag generated by airflow into the gas turbine engine intake, the thrust cradle drag force generated by airflow past the moveable support of the thrust cradle, the base drag generated as a result of accelerating nozzle ejector airflow, a pre-streamtube force related to turning of stream lines in the intake air path, a pre-stream tube force related to a bell mouth pull-off force are calculated. Forces due to forward anemometer plane and nozzle static pressures, and a nozzle exit buoyancy force are summed according to respective positive and negative values to determine the free field thrust at the selected engine operating point.
摘要翻译： 为了确定燃气涡轮发动机的自由场推力，燃气涡轮发动机可以附接到可移动支撑件，并且在选定的发动机工作点操作。 测量由发动机施加到推力支架上的推力。 燃气涡轮发动机进气动量阻力由气流引入燃气轮机发动机进气口，推力支架产生的气流通过推力支架的可动支撑产生的拖曳力，由于加速喷嘴气流而产生的底座阻力， 计算与进气通道中的流线的转动相关的流动力，计算与喇叭口拉脱力相关的预流管力。 由于正向风速计平面和喷嘴静压力引起的力和喷嘴出口浮力根据相应的正值和负值相加，以确定所选发动机工作点的自由场推力。
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公开(公告)号：US06851303B2
公开(公告)日：2005-02-08
申请号：US10334803
申请日：2003-01-02
CPC分类号： F01D25/285 , F01D21/003 , F05D2200/11 , F05D2200/211 , F05D2200/221 , G01L5/133
摘要： A method for determining the free-field thrust of a gas turbine engine using an enclosed gas turbine engine test facility without recourse to an outdoor gas turbine engine test facility. The method includes calculating the gas turbine engine intake momentum drag and cradle drag generated and compensating for these losses. In a further embodiment, the base drag is calculated and also compensated for.
摘要翻译： 一种用于使用封闭的燃气涡轮发动机测试设备来确定燃气涡轮发动机的自由场推力的方法，而不需要借助室外燃气涡轮发动机测试设备。 该方法包括计算产生的燃气涡轮发动机进气动量阻力和摇篮阻力并补偿这些损失。 在另一个实施例中，计算基础阻力并补偿。
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