01 - Aircraft Design and Integrated Systems
STUDY ON ADJOINT OPTIMIZATION OF BWB CONFIGURATION CONSIDERING THE INFLUENCE OF INTAKE AND EXHAUST SYSTEM
J.-T. Huang¹, Z. Zhou¹, Z.-H. Gao, Northwestern Polytechnical University, China; X. Chen¹, S.-D. Zhong¹; ¹China Aerodynamics Research and Development Center, China
For the integrated design of internal and external flow of aircraft, the intake and exhaust boundary conditions of discrete adjoint equation under the power state of propulsion system are studied. The chain derivation rule is used to avoid direct variations of conservative variables. In addition, the difficulty of variations of intake and exhaust boundary conditions is greatly simplified by introducing intermediate variables, and then the efficient sensitivity analysis method for design variables considering exhaust effect is established. The accuracy of numerical simulation of intake and exhaust is verified by TPS standard model calculation, and the accuracy of adjoint-based sensitivity calculation is verified by comparing with finite difference method. Taking the numerical simulation of intake and exhaust effects of BWB (Blend Wing Body) configuration as an example, the integrated optimization designs with and without power conditions were carried out, and the flow field characteristics such as design history, load distribution and pressure distribution under those two conditions were compared and analyzed.