Penetration of jets injected behind backward-facing step in supersonic stream

Kentaro Yamauchi, Hironori Kitadani, Goro Masuya, Sadatake Tomioka, Muneo Izumikawa

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Penetration of the perpendicular jets behind the step in the supersonic flow was experimentally investigated to clarify the effects of the merging of the recirculation at the step base and ahead of the jets. Hysterisis of the merging was used to compare the merged and unmerged flows for the same condition. The slope of the Mach disk height plotted versus the dynamic pressure ratio reduced as the merging occurred. The merging improved the lateral spread of the injectant near the injector and thus improve the ignition characteristics. The merging could be passively controlled by perforating the wall between the base and the injector. Active cooling of the merging was achieved by secondary injection from the perforated wall. The actively and passively controlled merging resulted in the Mach disk height data correlated by the same line with the data of the merged cases on the solid wall.

Original languageEnglish
Publication statusPublished - 1999 Jan 1
Event35th Joint Propulsion Conference and Exhibit, 1999 - Los Angeles, United States
Duration: 1999 Jun 201999 Jun 24

Other

Other35th Joint Propulsion Conference and Exhibit, 1999
CountryUnited States
CityLos Angeles
Period99/6/2099/6/24

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Systems Engineering
  • Aerospace Engineering

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  • Cite this

    Yamauchi, K., Kitadani, H., Masuya, G., Tomioka, S., & Izumikawa, M. (1999). Penetration of jets injected behind backward-facing step in supersonic stream. Paper presented at 35th Joint Propulsion Conference and Exhibit, 1999, Los Angeles, United States.