Abstract
A facility was built to investigate shock trains in a rectangular duct. A throttle valve, installed downstream of the diffuser, was used to create a hack pressure and hence a shock train, thus simulating the process that occurs in a ramjet engine. Results are presented for shock trains in a duct with a rectangular cross section. The shock train length is correlated to the conditions at the start of the shock train and the pressure rise achieved through the shock system. Two different step heights were used to determine the effect that the scramjet injectors will have on the ramjet isolator performance. Instream pitot and cone static pressure surveys were made downstream of the shock train. NOMENCLATURE R e g -
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