• Title/Summary/Keyword: 수직충격파 효율

Search Result 2, Processing Time 0.015 seconds

A Study on the Hypersonic Air-breathing Engine Ground Test Facility Composition and Characteristics (극초음속 공기흡입식 추진기관 지상 시험설비의 구성 및 특성에 관한 연구)

  • Lee, Yang-Ji;Kang, Sang-Hun;Yang, Soo-Seok
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.19 no.6
    • /
    • pp.81-90
    • /
    • 2015
  • In order to know the characteristics of the hypersonic air-breahting engine, high altitude and Mach number ground test is necessary. Therefore, high pressure and high temperature condition should be simulated to do ground test of the hypersonic air-breathing engine. In this paper, the hypersonic air-breathing engine ground test facility of the Korea Aerospace Research Institute was introduced and the composition and characteristics were described.

A Starting Characteristics Study of the Scramjet Engine Test Facility with a Mach 5.0 Nozzle (마하 5.0 노즐을 장착한 스크램제트 엔진 시험설비의 시동 특성 연구)

  • Lee, Yang-Ji;Yang, In-Young;Yang, Soo-Seok
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.17 no.4
    • /
    • pp.63-72
    • /
    • 2013
  • A Mach 5 nozzle and a diffuser of the Scramjet Engine Test Facility (SETF) were made for a hydrocarbon-fueled scramjet engine. SETF, attached with a diffuser guide, started with a model of 60% blockage, though the model engine could not start by over expansion of the facility nozzle. The model was moved into the nozzle to escape the shock generated from the nozzle exit, both SETF and the engine could start. The pitot rake experiments (blockage of 2.3%) were done for measuring the core flow in the test section. From the pitot experiments, the core flow was expanded by an under expansion. It means that the core flow in the test section was related with a model blockage. SETF and the engine with a blockage of 33% work normally. From a series of experiments, SETF started with a normal shock efficiency of 58%, regardless of a blockage ratio.