Flowfield near a Mulitiport Injector Array in a Supersonic Flow
| Autor: | L. S. Jacobsen, Joseph A. Schetz, Wing-Fai Ng |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Journal of Propulsion and Power. 16:216-226 |
| ISSN: | 1533-3876 0748-4658 |
| Popis: | Experiments were performed to study the effects of toe-in angle on the exterior ports of a three-hole, lowdownstream-angleinjector array in a supersonic e ow. The three jetswere arranged e ush with the test section e oor so that the interference between the three plumes and the main e ow would instill vortical motions. Three different cone gurations were tested involving three, 30 deg downstream angled, round injection holes in a row with sonic air and helium injection into a Mach 3.0 air cross stream. The two exterior holes of the row injector were set at toe-in angles of 0, 15, and 30 deg. The primary qualitative observations were nanoshadowgraphs and surface oil e ow visualization. A novel vertical plate e ow visualization concept was also tested. Aerothermodynamic probe measurementswereperformedata downstream location with heated airinjection to assessthetotalpressurelosses and mixing potential of the e ow. Results showed improved mixing and core penetration with an increase of jet momentum and toe-in angle. The observed oblique shock angle also increased with jet to freestream momentum ratio and toe-in angle, but the integrated total pressure losses associated with the injector shock structure were minimized with the 15 degree toe-in array injector. |
| Databáze: | OpenAIRE |
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