Predicted scramjet testing capabilities of the proposed RHYFL-X expansion tube

TL;DRAbstract

For the Supersonic Combustion Ramjet (Scramjet) to be realized as a viable hypersonicnpropulsion option, significant testing must be performed in test flows which duplicate thosenthat would be experienced during anticipated atmospheric flight. The expense associatednwith real flight tests necessitates that ground-based testing play a significant role in thenexperimental development of the scramjet. Based on current, or even near-term technologies,nthe expansion tube concept offers superior physical simulation of hypersonic flow. This studyninvestigates the potential performance capabilities of a large-scale, high-performance free-pistonndriven expansion tube based on the RHYFL shock tunnel project. The predictions arenfocused specifically on the ability of the RHYFL-X expansion tube to generate sub-orbitalnscramjet testing conditions and are obtained through one-dimensional and axisymmetricnsimulations of this proposed facility.n n To validate the simulation techniques and approximatio

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