Inlet starting of high-contraction axisymmetric scramjets

Hideaki Ogawa, Alex L. Grainger, Russell R. Boyce

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Reliable in-flight starting of the inlet is of critical importance for the successful operation of scramjet engines, particularly axisymmetric configurations with high contraction inlets. The present research is undertaken to examine the capability of various inlet starting methods based on two principles: unsteady flow effects and variable geometries. Timeaccurate viscous computations have been performed to investigate the transitional flowfields introduced by a variety of methods that are applicable to axisymmetric geometries. Parametric studies have been conducted for instantaneous rupture of conical diaphragms and addition of bleed slots, which induce highly unsteady flow phenomena. Several methods employing variable inlet geometries have been tested for the latter principle, including opening doors, rocket plugs and sliding doors (or diaphragm erosion). Successful inlet starting has been achieved as a result of unsteady transition induced by diaphragm rupture and quasi-steady transition due to the sliding door opening process. In particular, a bleed addition to the diaphragm rupture method has been found to be highly effective and pronounced flow stability has been observed in the sliding door process.

Original languageEnglish
Title of host publication16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
Publication statusPublished - Dec 1 2009
Event16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference - Bremen, Germany
Duration: Oct 19 2009Oct 22 2009

Publication series

Name16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference

Conference

Conference16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference
CountryGermany
CityBremen
Period10/19/0910/22/09

Fingerprint

Diaphragms
Unsteady flow
Geometry
Rockets
Erosion
Engines

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Ogawa, H., Grainger, A. L., & Boyce, R. R. (2009). Inlet starting of high-contraction axisymmetric scramjets. In 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference [2009-7401] (16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference).

Inlet starting of high-contraction axisymmetric scramjets. / Ogawa, Hideaki; Grainger, Alex L.; Boyce, Russell R.

16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference. 2009. 2009-7401 (16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ogawa, H, Grainger, AL & Boyce, RR 2009, Inlet starting of high-contraction axisymmetric scramjets. in 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference., 2009-7401, 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference, 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference, Bremen, Germany, 10/19/09.
Ogawa H, Grainger AL, Boyce RR. Inlet starting of high-contraction axisymmetric scramjets. In 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference. 2009. 2009-7401. (16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference).
Ogawa, Hideaki ; Grainger, Alex L. ; Boyce, Russell R. / Inlet starting of high-contraction axisymmetric scramjets. 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference. 2009. (16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference).
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