A New Paradigm for Flow Analyses and a Novel Technique to Enhance the Thrust from Scarfed NozzlesA new flow analysis paradigm and a novel technique to enhance scarfed nozzle thrust are presented. The new paradigm, the space-time Conservation Element and Solution Element (CESE) method, a truly unsteady and genuinely multi-dimensional flow solver that provides accurate solutions for Euler and Navier-Stokes flows, is well suited for next generation flow analyses.In this study, the space-time CESE method was applied to solve scarfed nozzles flow-fields. Nozzle scarfing is frequently used for vectoring control of a space propulsion sub-system; it reduces nozzle weight and length and lowers nozzle thrust. A novel technique to enhance scarfed nozzles' thrust is discussed and investigated. Results of 2D and 3D flow analyses are presented.
Document ID
20080047355
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Chang, I-Shih (Aerospace Corp. United States)
Chang, Sin-Chung (NASA Glenn Research Center Cleveland, OH, United States)
Glick, Robert L. (Propulsion Consultant United States)
Chang, Chau-Lyan (NASA Langley Research Center Hampton, VA, United States)