摘要
空速管结冰严重危害飞机飞行安全,其结冰防护系统一般采用电热防冰系统。通过对表面传热传质现象进行分析,构建了表面质量和能量守恒方程,采用剪切力判断表面溢流水流动方向,基于边界层积分方法计算了三维复杂表面对流换热系数,建立了电热防冰系统性能计算方法。将计算方法应用于三维电热防冰系统,计算结果与文献及试验数据吻合良好,验证了方法的正确性。针对典型空速管外形,计算了电热防冰系统性能,并根据计算结果进行了合理优化。方法可为空速管电热防冰系统设计和性能计算提供技术参考。
Ice accretion on pitot tube seriously endangers aircraft flight safety.The anti icing system of pitot tube generally adopts electrothermal anti icing system.Based on the analysis of the phenomenon of heat and mass transfer on the surface,the conservation equation of surface mass and energy was established.The flow direction of runback water on surface was judged by the shear stress of air flow.The convective heat transfer coefficients of three dimensional complex surfaces were calculated by the boundary layer integral method,and the calculation method of electrothermal anti icing system was established.The performance calculation method was applied to three dimensional airfoil electrothermal anti icing system,and the numerical results agreed well with the literature and experimental data,showing the correctness of this method.For the typical shape of pitot tube,the performance of electrothermal anti icing system was calculated and according to the calculation results,reasonable optimization was carried out.This method in this paper can provide technical references for the design and performance calculation of the pitot tube electrothermal anti icing system.
作者
刘重洋
王正之
田甜
朱春玲
LIU Chong-yang;WANG Zheng-zhi;TIAN Tian;ZHU Chun-ling(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空计算技术》
2019年第5期54-58,共5页
Aeronautical Computing Technique
基金
国家重点基础研究发展计划(973)基金项目资助(2015CB755800)
国家自然科学基金项目资助(51806105,11832012)
江苏省自然科学基金项目资助(BK20180442)
江苏省科技计划基金项目资助(BE2016006-5)
南京航空航天大学研究生创新基地(实验室)开放基金项目资助(kfjj20180102)
关键词
电热防冰
空速管
传热传质
性能计算
electrothermal anti icing
pitot tube
heat and mass transfer
performance calculation
