开启方式对短舱泄压门性能特性影响
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摘要
对不同开启方式下短舱泄压门性能特性进行了数值模拟,并根据NACA TN4007报告中的试验数据验证了数值计算的正确性,在此基础上,研究了在不同马赫数(Ma=0.5,0.7,0.9)和不同压力比(Rp=1.2,1.4,1.6)下开启方式对泄压门排放性能和受力特性的影响。计算结果表明:在一定马赫数下,泄压门排放系数随压力比的增加而增加;而在一定压力比下,泄压门排放系数随马赫数的升高而减小;在开启方式2下泄压门排放系数略优于开启方式1下,由于开启方式1下泄压门平行于来流,因此开启方式1下泄压门推力系数远小于开启方式2下,而泄压门力矩系数高于开启方式2下,约为开启方式2下的2倍。
The performance of nacelle pressure relief door under different opening modes was numerically simulated,and the correctness of the numerical calculation was verified according to the experimental data in the NACA TN4007 report.On this basis,different Mach numbers(Ma=0.5,0.7 and 0.9)and pressure ratios(Rp=1.2,1.4 and 1.6)were compared for the effects on the discharge performance and force characteristics of the pressure relief door.The calculation results showed that under a certain Mach number,the discharge flow coefficient Cdrincreased with the increase of pressure ratio.Under a certain pressure ratio,the discharge flow coefficient Cdrdecreased with the increase of Mach number.In opening mode 2,discharge flow coefficient of the pressure relief door was slightly better than in opening mode 1.Since the pressure relief door was parallel to the flow in opening mode 1,the pressure relief coefficient of the pressure relief door was much smaller than that of opening mode 2,and the pressure coefficient of the pressure relief door was higher than that of opening mode 2,about twice of opening mode 2.
The performance of nacelle pressure relief door under different opening modes was numerically simulated,and the correctness of the numerical calculation was verified according to the experimental data in the NACA TN4007 report.On this basis,different Mach numbers(Ma=0.5,0.7 and 0.9)and pressure ratios(Rp=1.2,1.4 and 1.6)were compared for the effects on the discharge performance and force characteristics of the pressure relief door.The calculation results showed that under a certain Mach number,the discharge flow coefficient Cdrincreased with the increase of pressure ratio.Under a certain pressure ratio,the discharge flow coefficient Cdrdecreased with the increase of Mach number.In opening mode 2,discharge flow coefficient of the pressure relief door was slightly better than in opening mode 1.Since the pressure relief door was parallel to the flow in opening mode 1,the pressure relief coefficient of the pressure relief door was much smaller than that of opening mode 2,and the pressure coefficient of the pressure relief door was higher than that of opening mode 2,about twice of opening mode 2.
引文
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[12]ABEEL P C.Access and pressure release door latch mechanism:US3571977[P].1971-03-23.
[13]TOUHIMAA C R,PAISH S D.Aircraft pressure management system:WO,WO 2009/042322A1[P].2009-04-02.
[14]SIEMS R J,VOORHEES A B.Blow-out safe aircraft doors:US2748855[P].1956-06-05.
[15]JENSEN D T,BALZER R L.Flow control apparatus for gas turbine engine installation pressure relief doors:US5704207[P].1998-01-06.
[16]PEARSON K A,MOORHOUSEM D.Pressure relief panel for aircraft powerplant:US4232513[P].1980-11-11.
[17]MICHAEL A E,JONES M D,DUNSTAN KW.Spring loaded pressure relief door:US2012/0125010 A1[P].2012-05-24.
[18]BUBELLO R,REAM J L.Ventilation system for a nacelle:US4825644[P].1989-05-02.
[2]VERSEUX O,SOMMERER Y.New challenges for engine nacelle compartments pressure and thermal loads management with aircraft engine evolution[C]∥29th Congress of International Council of the Aeronautical Sciences.Peterburg,Russia:ICAS,2014:501-509.
[3]RAGHUNATHAN S,BENARD E,WATTERSON J K,et al.Key aerodynamic technologies for aircraft engine nacelles[J].Aeronautical Journal,2006,110(1107):265-288.
[4]DEWEY P E.A preliminary investigation of aerodynamic characteristics of small inclined air outlets at transonic Mach numbers[R].NACA TN3442,1953.
[5]DEWEY P E,VICK A R.An investigation of the discharge and drag characteristics of auxiliary-air outlets discharging into a transonic stream[R].NACA TN3466,1955.
[6]VICK A R.An investigation of discharge and thrust characteristics of flapped outlets for stream Mach numbers from 0.40to 1.30[R].NACA TN4007,1957.
[7]PRATT P R,WATTERSON J K,BENARD E.Computational and experimental studies of pressure relief doors in ventilated nacelle compartments[J].Investigative Ophthalmology&Visual Science,2003,28(10):1678-86.
[8]PRATT P R,WATTERSON J K,BENARD E,et al.Performance of a flapped duct exhausting into a compressible external flow[R].Yokohama,Japan:24th International Congress of the Aeronautical Sciences,ICAS2004-04.2.R.2,2004.
[9]BENARD E,WATTERSON J K,GAULT R,et al.Review and experimental survey of flapped exhaust performance[J].Journal of Aircraft,2008,45(1):349-352.
[10]VEDESHKIN G,DUBOVITSKIY A,BONDARENKO D,et al.Experimental investigations of hydraulic devices performance in aviation engine compartment[R].Brisbane,Australia:28th International Congress of the Aeronautical Sciences,ICAS2012-P2.10,2012.
[11]SCHOTT T.Computational analysis of aircraft pressure relief doors[D].Colorado:Colorado State University,2016.
[12]ABEEL P C.Access and pressure release door latch mechanism:US3571977[P].1971-03-23.
[13]TOUHIMAA C R,PAISH S D.Aircraft pressure management system:WO,WO 2009/042322A1[P].2009-04-02.
[14]SIEMS R J,VOORHEES A B.Blow-out safe aircraft doors:US2748855[P].1956-06-05.
[15]JENSEN D T,BALZER R L.Flow control apparatus for gas turbine engine installation pressure relief doors:US5704207[P].1998-01-06.
[16]PEARSON K A,MOORHOUSEM D.Pressure relief panel for aircraft powerplant:US4232513[P].1980-11-11.
[17]MICHAEL A E,JONES M D,DUNSTAN KW.Spring loaded pressure relief door:US2012/0125010 A1[P].2012-05-24.
[18]BUBELLO R,REAM J L.Ventilation system for a nacelle:US4825644[P].1989-05-02.