U.S.-China Cooperative Research (Engineering): Study of Unresolved Problems of Transonic and Supersonic Equivalence Rules with Lift

这是一个为期两年的合作项目， 加州大学洛杉矶分校的程和罗 中国西北工业大学Xi。 它由NSF和西北大学联合赞助。 理工大学。 提出了一种结合CFD-渐近研究， 一些未解决的，非线性方面和相关问题， 等价规则的理论与应用 米.到 要考虑的议题包括： 跨音速和超音速等效规则， 非线性近场和使用/发展的欧拉和 通过区域分解的Navier-Stockes解（以及 编程并行性），其主要目标是 确定近距离冲击和流动的程度 字段可以影响规则的有效性/适用性。 包括 也是一个三维跨音速计算机程序开发 小扰动方程的具体目的是 应用等效法则预测激波损失， 远场，这是迄今为止不可用的。 中 要分析的结构是风洞试验模型， 阻力和流场数据可用于 比较，以及斜，全翼设计，其中 具有非线性近场性能增益最大 很明显

This is a two-year collaborative project between Hsien-Kei Cheng of the University of California, Los Angeles, and Luo Shijun of Northwestern Polytechnic University, Xi'an, China. It is sponsored jointly by the NSF and the Northwestern Polytechnic University. A combined CFD-asymptotic study is proposed to investigate several unresolved, nonlinear aspects and related issues in the theory and application of equivalence rules involving lift. Among the topics to be considered are new aspects of transonic and supersonic equivalence rules involving a nonlinear near field and the use/development of Euler and Navier-Stockes solutions via domain decomposition (and programming parallelism), with the main objective of ascertaining the degree to which shocks and flow in the near field can affect the rule's validity/applicability. Included is also a computer-program development for a 3-D transonic small-disturbance equation with the specific purpose of applying the equivalence rule for predicting shock loss in the far field, which is unavailable heretofore. Among the configurations to be analyzed are wind-tunnel test models, for which drag and flow-field data are available for comparison, as well as oblique, all-wing designs, of which the performance gain with a nonlinear near field is most apparent.