Numerical Prediction of Surface Heat Flux During Multiple Jets Firing for Missile Control

S. Saha; P. K. Sinha; D. Chakraborty

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Numerical Prediction of Surface Heat Flux During Multiple Jets Firing for Missile Control

机译：导弹控制多发射击表面热通量的数值预测

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Numerical simulations are carried out to obtain the flowfield and heat flux arising out of the flow interactions of different control thrusters viz. vernier, pitch, yaw, roll and divert thruster among themselves as well as with free stream at different altitudes of operation. Three critical points on a typical trajectory of a missile are chosen and combinations of the thrusters operating at those conditions are considered. Simulations have also been performed to simulate DT motor interaction with free stream at different altitude. The interaction of different motor flowfield with the free stream presents a very complex flowfield. Flow gradients are very high close to the nozzle exit because of high altitude operation of motors. 3-Dimensional RANS equations are solved along with k-e turbulence model on unstructured tetrahedral grid using commercial CFD software. The flow properties along with the surface heat flux distribution for four isothermal wall temperatures 350, 450, 550, 650 K are computed and provided for surface temperature prediction. It is observed that with increase in altitude, the high heat flux region reduces and heat transfer coefficient is independent of wall temperature.

机译：进行数值模拟以获得由不同控制推进器的流动相互作用产生的流场和热通量。游标，俯仰，偏航，侧倾和转向推进器相互之间以及在不同的操作高度下都可以自由流动。选择导弹典型轨迹上的三个临界点，并考虑在这些条件下运行的推进器的组合。还进行了模拟以模拟DT电机与不同高度的自由流之间的相互作用。不同的马达流场与自由流的相互作用呈现出非常复杂的流场。由于电动机的高海拔运行，靠近喷嘴出口的流量梯度非常高。使用商用CFD软件在无结构四面体网格上求解了3维RANS方程以及k-e湍流模型。计算四个等温壁温350、450、550、650 K的流动特性以及表面热通量分布，并将其提供给表面温度预测。可以看出，随着高度的增加，高热通量区域减小，并且传热系数与壁温无关。

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《Journal of the Institution of Engineers (Inida)》 |2013年第1期|85-91|共7页
作者
S. Saha; P. K. Sinha; D. Chakraborty;
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作者单位

CCD Division, DOCD, Defence Research and Development Laboratory, Hyderabad 500 058, India;

CCD Division, DOCD, Defence Research and Development Laboratory, Hyderabad 500 058, India;

CCD Division, DOCD, Defence Research and Development Laboratory, Hyderabad 500 058, India;

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正文语种 eng
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关键词
CFD; Heat flux; Missile control; Reaction control system;

机译：差价合约热通量;导弹控制;反应控制系统;

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1. Numerical Prediction of Surface Heat Flux During Multiple Jets Firing for Missile Control [J] . S. Saha, P. K. Sinha, D. Chakraborty Journal of The institution of engineers (India), Series C . 2013,第1期

机译：导弹控制射击多次喷射过程中表面热通量的数值预测
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Numerical Prediction of Surface Heat Flux During Multiple Jets Firing for Missile Control

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