Modeling and optimization of turbine-based combined-cycle engine performance | Posted on:2005-05-02 | Degree:M.S | Type:Thesis | University:University of Maryland, College Park | Candidate:Clough, Joshua | Full Text:PDF | GTID:2452390008995060 | Subject:Engineering | Abstract/Summary: | | The fundamental performance of several TBCC engines is investigated from Mach 0--5. The primary objective of this research is the direct comparison of several TBCC engine concepts, ultimately determining the most suitable option for the first stage of a two-state-to-orbit launch vehicle. TBCC performance models are developed and optimized. A hybrid optimizer is developed, combining the global accuracy of probabilistic optimization with the local efficiency of gradient-based optimization. Trade studies are performed to determine the sensitivity of TBCC performance to various design variables and engine parameters. The optimization is quite effective, producing results with less than 1% error from optimizer repeatability. The turbine-bypass engine (TBE) provides superior specific impulse performance. The hydrocarbon-fueled gas-generator air turborocket and hydrogen-fueled expander-cycle air turborocket are also competitive because they may provide greater thrust-to-weight than the TBE, but require some engineering problems to be addressed before being fully developed. | Keywords/Search Tags: | Engine, Performance, TBCC, Optimization | | Related items |
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