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公开(公告)号：US11168611B2
公开(公告)日：2021-11-09
申请号：US16423629
申请日：2019-05-28
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine has high efficiency together with low noise, in particular the noise emanating from the front of the fan. The contribution of the fan noise emanating from the front of the engine to the Effective Perceived Noise Level (EPNL) at a take-off lateral reference point, defined as the point on a line parallel to and 450 m from the runway centre line where the EPNL is a maximum during take-off, is in the range of from 0 EPNdB and 12 EPNdB lower than the contribution of the fan noise emanating from the rear of the engine to the EPNL at the take-off lateral reference point.
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公开(公告)号：US11629667B2
公开(公告)日：2023-04-18
申请号：US17193317
申请日：2021-03-05
申请人： ROLLS-ROYCE PLC
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.
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公开(公告)号：US10975802B2
公开(公告)日：2021-04-13
申请号：US16398707
申请日：2019-04-30
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.
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公开(公告)号：US11988148B2
公开(公告)日：2024-05-21
申请号：US16423253
申请日：2019-05-28
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
CPC分类号： F02C7/24 , F02C6/02 , F02C7/36 , F05D2260/96
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine is provided that has high efficiency together with low noise, in particular from the jet flow exiting the engine and the turbine. The combined contribution of the jet and the turbine to the Effective Perceived Noise Level (EPNL) at a take-off lateral reference point, defined as the point on a line parallel to and 450 m from the runway centre line where the EPNL is a maximum during take-off, is in the range of from 3 EPNdB and 15 EPNdB lower than the total engine EPNL at the take-off lateral reference point.
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公开(公告)号：US10590851B1
公开(公告)日：2020-03-17
申请号：US16399123
申请日：2019-04-30
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine has high efficiency together with low noise, in particular from the turbine that drives the fan. The contribution of the turbine noise emanating from the rear of the engine to the Effective Perceived Noise Level (EPNL) is in the range of from 7 EPNdB and 30 EPNdB lower at a take-off lateral reference point than at an approach reference point.
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公开(公告)号：US11988170B2
公开(公告)日：2024-05-21
申请号：US18070660
申请日：2022-11-29
申请人： ROLLS-ROYCE PLC
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.
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公开(公告)号：US11542890B2
公开(公告)日：2023-01-03
申请号：US17193323
申请日：2021-03-05
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine that has high efficiency provides low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a noise parameter NP that results in a gas turbine engine having reduced combined fan and turbine noise.
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8.发明授权公开(公告)号：US11181075B2
公开(公告)日：2021-11-23
申请号：US16411400
申请日：2019-05-14
申请人： ROLLS-ROYCE PLC
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine has high efficiency together with low noise, in particular from the bypass flow exiting the engine. The average velocity of the flow at the exit to the bypass duct is in the range of from 200 m/s to 275 m/s at a take-off lateral reference point, defined as the point on a line parallel to and 450 m from the runway centre line where the Effective Perceived Noise Level (EPNL) is a maximum during take-off.
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公开(公告)号：US10815895B2
公开(公告)日：2020-10-27
申请号：US16716698
申请日：2019-12-17
申请人： ROLLS-ROYCE plc
发明人： Alastair D Moore , Robert J Telling
摘要： A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine has high efficiency together with low noise, in particular from the turbine that drives the fan. The contribution of the turbine noise emanating from the rear of the engine to the Effective Perceived Noise Level (EPNL) is in the range of from 7 EPNdB and 30 EPNdB lower at a take-off lateral reference point than at an approach reference point.
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