Investigation of the Process of Energy Transfer from an Intermittent Jet to Secondary Fluid in an Ejector-Type Thrust Augmenter

摘要

Besides application of high-speed temperature measuring instrumentation, a search was made for a digital computer program that could be adapted to the problem. This resulted in the evaluation of the KO code developed by the U. of Cal. Radiation Laboratory. This code uses a numerical differencing method with injection of a 'Q-term' of artificial viscosity whenever an incipient shock condition develops. The addition of the 'Q-term' in appropriate amounts prevents a discontinuity so that the computer program can then handle the shock condition and determine when and where it will develop as well.