Fluid-orbit Coupling Calculation for Flight Analysis of Impulsively Driven Laser Vehicle
Fluid-orbit Coupling Calculation for Flight Analysis of Impulsively Driven Laser Vehicle
复制标题
脉冲驱动激光飞行器飞行分析的流轨耦合计算
DOI：
10.1088/1742-6596/454/1/012004
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Takahashi and N. Ohnishi
中科院分区：
文献类型：
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作者：
影山賀昭;高橋聖幸;大西直文;M. Takahashi and N. Ohnishi
利用流轨耦合模拟器，数值求解了三维Navier-Stokes方程，并交换了六自由度反应信息，以预测激光推进飞行器在冲击波驱动下的冲击飞行运动。通过将角速度和平移速度反馈到流场中，引入由非定常飞行器运动引起的压力和粘性阻力，以提供精确的运动分析。在激光助推飞行器的脉冲运动估计中，如果使用定常流的气动力系数来模拟飞行器的运动效应，则会低估恢复力和恢复力矩。此外，一个简单的模型，使用脉冲数据的实验研究预测的脉冲运动相比，我们的耦合方法，可以重现车辆和冲击波之间的相互作用所产生的瞬时加速度。速度超调是通过评估通过耦合计算的急剧推力，和飞行高度变得比传统的预测使用脉冲数据大6%。
Using a fluid-orbit coupling simulator, we numerically solve the three-dimensional Navier-Stokes equations with exchanging information of six-degree-of-freedom reactions for predicting impulsive flight motions of a laser propulsion vehicle driven by blast waves. By feedback of angular and translational velocities into the flowfield, pressure and viscous drags induced by the unsteady vehicle motion are introduced to provide precise motion analysis. In the impulsive-motion estimation of the laser-boosted vehicle, restoring forces and moments are underestimated if the vehicle motion effect is modeled using aerodynamic coefficients of steady flow. Also, a simple model using impulse data examined by experiments for predicting the impulsive motion is compared with our coupling approach which can reproduce instantaneous acceleration resulting from the interaction between the vehicle and the blast wave. Velocity overshoot is generated by evaluating sharp thrust through the coupling calculation, and the flight height becomes 6% larger than conventional prediction using the impulse data.