Aerodynamic Optimization Under a Range of Operating Conditions

摘要

In aerodynamic design, good performance is generally required under a range of operating conditions, including off-design conditions. This can be achieved through multipoint optimization. The desired performance objective and operating conditions must be specified, and the resulting optimization problem must be solved in such a manner that the desired performance is achieved. Issues involved in formulating multipoint optimization problems are discussed. A technique is proposed for automatically choosing sampling points within the operating range and their weights to obtain the desired performance over the range of operating conditions. Examples are given involving lift-constrained drag minimization over a range of Mach numbers. Tradeoffs and their implications for the formulation of multipoint problems are presented and discussed.