A Source-Doublet Approach to Modeling Triple Ejector Rack Store Configurations and Force Calculations PDF Download

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A Source-Doublet Approach to Modeling Triple Ejector Rack Store Configurations and Force Calculations

A Source-Doublet Approach to Modeling Triple Ejector Rack Store Configurations and Force Calculations PDF Author:
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Languages : en
Pages : 95

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Book Description
The method presented in this report extends the FDL Subsonic Store Separation Program to include the aerodynamic modeling of the separating store as well as adjacent stores and the ejector rack. In the work presented in AFFDL- TR-74-130 only the volume effects of the stores and ejector rack are accounted for and Slender Body theory is used to calculate forces and moments on the separating store. In this report, doublets are used to model the upwash and sidewash of adjacent stores and the ejector rack. The induced flow-field portion of the total aircraft flow-field is included in the boundary conditions. Once the non-uniform flow-field has been modeled, three-dimensional point sources and doublets along the separating store axis are used to calculate loadings. Store loadings using Slender Body theory and the Source-Doublet method are compared to wind tunnel data. It is hoped that this method might offer a viable alternative to a complete mutual interference solution such as a paneling approach. (Author).