THE ISENTROPIC COMPRESSION TUBE: A NEW APPROACH TO GENERATING HYPERVELOCITY TEST FLOWS WITH LOW DISSOCIATION
CORNELL AERONAUTICAL LAB INC BUFFALO NY
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A new approach to generating high-velocity air flows with very low ambient dissociation levels is discussed. Briefly, the approach utilizes a nonsteady isentropic compression wave which is focused through an area contraction to accelerate and compress the test gas. This processed gas may be used directly as a test medium or may be allowed to expand non-steadily through the expansion wave which appears at the focal point of the compression wave system. In either case, the flow may be further expanded in a nozzle if so desired. The advantages and disadvantages of both methods of operation are discussed. The problem of generating the required wave motion is presented in some detail and preliminary studies of several possible driving techniques are summarized.
- Atmospheric Physics
- Physical Chemistry
- Test Facilities, Equipment and Methods
- Fluid Mechanics