【作者】 王振清； 吕红庆； 靳承滨；

【Author】 Wang Zhenqing,Lv Hongqing,Jin Chengbin (College of Aerospace and Civil Engineering,Harbin Engineering University.Harbin,150001)

【机构】 哈尔滨工程大学航天与建筑工程学院；

【摘要】 在理论与半经验公式基础上,本文利用参考焓方法计算了飞行器表面气动加热热流,同时采用CFD方法模拟了反向喷流热防护系统的防热效果,对反向喷流热防护作用下的壁而热流进行了预测,数值模拟结果与试验结果拟合良好。通过分析反向喷流干扰流场,初步揭示了喷流热防护的防热机理,并对反向喷流流场的自激振荡现象进行了研究,指出在进行反向喷流流场数值模拟时,即使流场处于稳定状态,也应该采用非稳态算法并对流场参数在至少一个振动周期内求平均值。更多还原

【Abstract】 Based on the theory and semi-empirical formulas,the surface heating flux of aerodynamic heating is calculated by using reference enthalpy method,and the anti-thermal effects of thermal protection system with opposing jet are simulated by using methods of CFD.The heating flux of wall under opposing jet is predicted,and the results show that the numerical and experimental results are in good agreement,which demonstrates the basic thermal protection mechanism of opposing jet heat protection.Then the oscillations of flow field around a hemispherical nose with opposing jet are computed,the results show that time-accurate algorithm and time-averaged method are necessary when an opposing jet flow field is solved,even when the flow field is steady.更多还原