舰载四摆臂式扰流片气动力数值仿真研究

Numerical Simulation on Aerodynamic Force of Shipborne Four-swing-arm Type Spoilers

摘要:

为满足工程应用中四摆臂式扰流片气动力分析和飞行力学建模的需求，针对四摆臂式扰流片分别开展了主推力和侧向力调节气动力数值仿真，获得了扰流片矢量力控制能力。首先，提出了四摆臂式扰流片主推力和侧向力调节策略。其次，搭建了四摆臂式扰流片数值仿真模型。最后，通过数值仿真手段分别研究了单扰流片气动力、扰流片推力调节和侧向力调节能力。数值仿真结果表明：四摆臂式扰流片主推力调节能力超过 30%；当主推角小于 32°，主推力跟主推角线性关系较好，扰流片间的气动干扰小。四摆臂式扰流片侧向力调节能力强，能产生最大 53.5 N 的侧向力，且侧向力跟侧向力差动角线性关系强，极利于弹体姿态控制。

关键词:固体火箭发动机;扰流片;数值仿真;推力矢量控制

Abstract:

In order to meet the requirements of aerodynamic analysis and flight mechanics modeling for four-swing-arm spoilers in engineering applications，numerical simulation of aerodynamic adjustment of the main thrust force and lateral force is carried out respectively for the four-swing-arm spoilers，and the vector force control capability of the spoilers is obtained. Firstly，the adjustment strategy of the main thrust and lateral forces of the four-swing-arm spoilers is proposed. Secondly，a numerical simulation model for the four-swing-arm spoilers is established. Finally，the aerodynamic forces of a single spoiler，the thrust and lateral force adjustment capabilities of the four-swing-arm spoilers are studied through simulation. The simulation results indicate that the main thrust adjustment capability of the spoilers is higher than 30%. When the main thrust angle is less than 32°，the linear relationship between the main thrust force and the main thrust angle is better，and the aerodynamic interference between the spoilers is small. Furthermore，the four-swing-arm spoilers demonstrate a strong ability to adjust lateral forces，and can generate a maximum lateral force of 53.5 N. Additionally，the lateral force shows a strong linear relationship with the differential angle of the lateral force，which is very beneficial to missile attitude control.

Key words:solid rocket motor;spoiler;numerical simulation;thrust vector control