乘波机外形设计

计算了由锥型流理论、吻切锥理论及吻切轴对称理论生成的不同乘波机外形.结果表明,圆锥绕流流场生成乘波机外形的方法虽然比较简便,且生成的外形具有较高的升阻比,但进气道进口流场具有锥型流的性质而不够均匀,给发动机的工作带来不利影响.应用吻切锥、吻切轴对称理论与特征线方法结合起来进行反设计,可以得到更一般的乘波机外形,并且能有效地改善进气道进口流场,提高容积效率.此外,这几种方法的计算速度都很快,对进一步的优化处理及机身-发动机一体化十分有利.

Waverider Configuration Design

The computation of generating waverider configurations using the theories of conical flow field,OC(Osculating Cone) and OA (Osculating Axisymmetric) flows are presented. Investigation shows that the method of using conical flow field theory is relatively simple and the lift to drag ratio of the configuration generated is high. But the inlet flow field is not quite uniform and thus it is not beneficial to the engine. The inverse design of using OA and OC theories accompanied with the inverse characteristic method can get the most universal waverider configurations and improve the inlet flow field quality and the volume efficiency effectively. Additionally, these methods have high speed of computation,which is quite promising for the integration design and optimization process later.