Precision Kinematic Model for Throat of Axisymmetric Vectorexhaust Nozzle
-
摘要: 轴对称矢量喷管中喉道面积大小影响战斗机的喷管性能,研究通常是以收敛调节片末端的内切圆表示其面积,该种表示在调节片数量不同的情况下导致存在不同程度的误差,不利于进一步进行定量分析。首先研究了喉道截面多边形的变化规律,建立了精确的喉道面积计算通用表达式;其次结合凸轮反转法和坐标转换,推导了适用于一般曲线截面的凸轮滚子喉道控制的运动学模型;最后建立实际算例,进行数值计算和虚拟仿真的验证。研究表明,数值计算与虚拟仿真结果吻合度较高,最大相对误差为0.79%,说明建立的运动学模型正确反映了喉道的运动规律。Abstract: Axisymmetric vector nozzle throat area has an important influence on the nozzle performance. Generally the inscribed circle of convergence adjusting piece end represents the throat area. Different errors exist for different number of adjusting piece, and the accuracy is not high enough for further quantitative analysis. In this paper, the characteristics of throat polygon were studied and the exact expression of throat area was deduced. The kinematic model of throat circle was established by utilizing cam inversion method and coordinates transformation. Numerical calculation and virtual simulation were conducted and compared for an example. The results of the numerical calculation and the virtual simulation agree well and the maximum relative error is 0.79%. It demonstrates the correctness of the established kinematic model of throat.
-
[1] Hauer T A. Axisymmetric vectoring exhaust nozzle:U.S. Patent 4994660[P]. 1991-02-19 [2] 梁春华,张仁,沈迪刚.国外航空发动机推力矢量喷管技术的发展研究[J].航空发动机,1998,(1):49-55 Liang C H, Zhang R, Shen D G. Development of thrust vectoring nozzles for aeroengine in foreign country[J]. Aeroengine, 1998,(1):49-55(in Chinese) [3] 王玉新.喷气发动机轴对称推力矢量喷管[M].北京:国防工业出版社,2006:1-19 Wang Y X. Axial-symmetric vectoring exhaust nozzle for jet-thrust-aircraft[M]. Beijing:National Defense Industry Press, 2006:1-19(in Chinese) [4] Williams R G, Vittal B R. Fluidic thrust vectoring and throat control exhaust nozzle[R]. AIAA 2002-4060, 2002 [5] Taskiran O O, Ergeneman M. Effect of nozzle dimensions and fuel type on flame lift-off length[J]. Fuel, 2014,115:833-840 [6] Saito T, Fujimoto T. Numerical studies of shock vector control for deflecting nozzle exhaust flows[M]//Hannemann K, Seiler F. Shock Waves. Berlin Heidelberg:Springer, 2009:985-990 [7] Deere K A, Berrier B L, Flamm J D, et al. Computational study of fluidic thrust vectoring using separation control in a nozzle[R]. AIAA-2003-3803, 2003 [8] 额日其太,李喜喜,王强.轴对称喷管喉道面积射流控制数值模拟研究[J].推进技术,2010,31(3):361-365 Eriqitai, Li X X, Wang Q. Computational investigation on axisymmetric nozzles with fluidic injection for throat area control[J]. Journal of Propulsion Technology, 2010,31(3):361-365(in Chinese) [9] 王玉新,王仪明,李雨桐.轴对称推力矢量喷管载荷变形的控制补偿[J].航空动力学报,2007,22(10):1685-1689 Wang Y X, Wang Y M, Li Y T. Load deformation compensation of the axisymmetric vectoring exhaust nozzle[J]. Journal of Aerospace Power, 2007,22(10):1685-1689(in Chinese) [10] 王玉新.轴对称推力矢量喷管运动奇异性分析[J].航空动力学报,2009,24(1):162-168 Wang Y X. Singularity analysis of axisymmetric vectoring exhaust nozzle[J]. Journal of Aerospace Power, 2009,24(1):162-168(in Chinese) [11] 王莉,袁茹,王三民,等.温固耦合下轴对称推力矢量喷管驱动机构的运动精度分析[J].机械科学与技术,2008,27(6):752-756 Wang L, Yuan R, Wang S M, et al. Kinematic precision analysis of axial-symmetric vectoring exhaust nozzle with coupling of temperature and structure[J]. Mechanical Science and Technology for Aerospace Engineering, 2008,27(6):752-756(in Chinese) [12] 王贝,袁茹,王三民,等.轴对称推力矢量喷管驱动机构的多目标优化设计研究[J].机械科学与技术,2009,28(9):1180-1184 Wang B, Yuan R, Wang S M, et al. Multi-objective optimization for the driving mechanism of an axial-symmetric vectoring exhaust nozzle[J]. Mechanical Science and Technology for Aerospace Engineering, 2009,28(9):1180-1184(in Chinese) [13] 唐宇峰,沈锡钢,李泳凡,等.喷管喉道面积变化对大涵道比分排涡扇发动机性能的影响[J].航空发动机,2011,37(1):12-15,19 Tang Y F, Shen X G, Li Y F, et al. Effect of nozzle throat area variation on performance of high bypass ratio turbofan engine with separate flow[J]. Aeroengine, 2011,37(1):12-15,19(in Chinese) [14] 吴虎,廉小纯,苏三买,等.改善双轴发动机加速性的变喷管调节分析[J].推进技术,2000,21(6):25-27 Wu H, Lian X C, Su S M, et al. Improving acceleration dynamic performance of a two-spool turbojet using variable nozzle area controls[J]. Journal of Propulsion Technology, 2000,21(6):25-27(in Chinese) [15] 周吉利,贾东兵,邵万仁,等.涡轮发动机可调收扩喷管主要性能影响因素计算分析[J].航空发动机,2013,39(4):56-60 Zhou J L, Jia D B, Shao W R, et al. Analysis of main influencing factors on convergent-divergent nozzle performance[J]. Aeroengine, 2013,39(4):56-60(in Chinese) [16] 安子军,张善璞,李纯德.机械原理教程[M].北京:机械工业出版社,2003:111-115 An Z J, Zhang S P, Li C D. Mechanical principle course[M]. Beijing:China Machine Press, 2003:111-115(in Chinese)
点击查看大图
计量
- 文章访问数: 180
- HTML全文浏览量: 45
- PDF下载量: 6
- 被引次数: 0