基于数值模拟的翼身融合布局飞机上悬式发动机布置技术

Blended-wing-body aircraft overhanging engine layout technology based on numerical simulation

发动机进排气对飞机气动特性具有重要影响。为了评估翼身融合布局(BWB)飞机上悬式发动机不同布置方式对全机气动特性的影响,首先开展了发动机短舱进排气与全机流场耦合的数值模拟技术研究,验证了计算方法的正确性。在此基础上,针对发动机安装于翼身升力面之上的BWB运输类飞机,开展飞机巡航飞行条件下,发动机不同支撑高度下沿流向及展向不同安装位置的进排气与全机流场耦合数值模拟,评估发动机不同布置方式对全机气动特性的影响,形成发动机不同布置方式影响的规律性结论。

Engine intake and exhaust have important influence on aircraft aerodynamic characteristics. To evaluate the aerodynamic characteristics of Blended-Wing-Body (BWB) aircraft with different overhanging engine layout modes, the numerical simulation technology of simulating the coupling between the intake and exhaust of the engine nacelle and the flow field of the aircraft is first carried out to verify the correctness of the calculation method. On this basis, a numerical simulation of the coupling between intake and exhaust of aircraft with different supporting heights, different streamwise and spanwise positions of the engine under the condition of aircraft cruising is carried out to evaluate the different layouts of the engine. The influence of different layout modes on the aerodynamic characteristics of aircraft is evaluated, and the regularity of the influence of different layout modes of engine is formed.