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Author Shukla, Vijay ♦ Mark, Andrew Gelsey ♦ Schwabacher, Mark ♦ Smith, Donald ♦ Knight, Doyle D.
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Objective Function ♦ Original P8 Inlet ♦ Nasa P8 Hypersonic Inlet ♦ Automated Methodology ♦ Additional Cowl-generated Compression ♦ Detailed Experimental Measurement ♦ Significant Impact ♦ Artificial Intelligence Method ♦ Cowl Shock ♦ Gradient-based Optimizer ♦ 3-d Reynolds-averaged Navierstokes Code ♦ Appropriate Contouring ♦ Automated Redesign ♦ Approximate Cancellation ♦ Final Design ♦ Shock System ♦ Several Different Formulation ♦ Several Different Redesigns
Description In 32nd Joint Propulsion Conference, (Lake Buena Vista, Fl
The NASA P8 hypersonic inlet has been redesigned using an automated methodology incorporating a 3-D Reynolds-averaged NavierStokes code, a gradient-based optimizer and artificial intelligence methods. The objective of the redesign is to cancel the cowl shock and the additional cowl-generated compression at the centerbody by appropriate contouring of the centerbody boundary. The original P8 inlet, designed in the early 1970s, was intended to achieve this same objective, but detailed experimental measurements indicated that a substantial reflected shock system was present. We have obtained several different redesigns which achieve approximate cancellation of the cowl shock and additional cowl-generated compression. The choice of the objective function, which is used to drive the optimization, has a significant impact on the final design. Several different formulations for the objective function have been employed, and improvements of 60% to 80% have been achieved. Presented at 32 nd J...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 1996-01-01