한국분무공학회지 (Journal of ILASS-Korea)

  • 제25권3호
  • /
  • Pages.95-102
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  • 2020
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  • 1226-2277(pISSN)
  • /
  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
권호 표지
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전단동축형 분사기의 유량계수에 대한 형상학적 변수들의 영향

Effect of Geometrical Parameters on Discharge Coefficients of a Shear Coaxial Injector

  • 안종현 (충북대학교 기계공학부) ;
  • 이근석 (충북대학교 기계공학부) ;
  • 안규복 (충북대학교 기계공학부)
  • 투고 : 2020.07.10
  • 심사 : 2020.08.11
  • 발행 : 2020.09.30
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초록

Six shear coaxial injectors for a 3 tonf-class liquid rocket engine using oxygen and methane as propellants were designed and manufactured by considering geometric design parameters such as a recess length and a taper angle. Cold-flow tests on the injectors were performed using water and air as simulants. By changing the water mass flow rate and air mass flow rate, the injection pressure drop under single-injection and bi-injection was measured. The discharge coefficients through the injector oxidizer-side and fuel-side were calculated and the discharge coefficient ratio between bi-injection and single-injection was obtained. Under single-injection, the recess served to reduce the injection pressure drop on the injector fuel-side. For the injectors without recess, the discharge coefficients under bi-injection were almost the same as those under single-injection. However, for the injectors with recess, the taper angle and bi-injection had a significant effect on the discharge coefficient.

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참고문헌

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