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- W2000882030 abstract "기본 유동 형상은 상대적으로 얇은 중간층이 연료와 공기 사이에 끼어있는 평행 2단 혼합층으로 구성되어 있다. 본 연구는 중간층의 두께 변화에 따른 연소 향상을 수치해석을 통해 조사하였다. 이 경우에, 난류 혼합층에서 열 방출에 의한 효과가 중요하다. 수치해석을 수행하기 위해 완전 보존적인 비정상 2차 시간 정확도의 하부 반복 기법과 2차 총 변화 억제 기법을 k-<TEX>${omega}$</TEX> 전단응력이동 모델이 결합된 유한체적법과 함께 사용하였다. 다음과 같이 3개의 경우에 대해 해석을 수행하였다. 연료와 공기로 구성된 단일 혼합층, 연료와 공기 사이에 불활성 기체층이 끼어있는 2단 혼합층, 그리고 연료와 공기 사이에 차가운 연료층이 끼어있는 2단 혼합층. 수치해석은 중간 기체층이 1, 2, 4 mm 인 경우에 대하여 수행되었다. 기체층의 총 두께는 4 cm이다. 불활성기체층이 2, 4 mm인 경우와 저온의 연료층이 4 mm인 경우에 단일 혼합층의 경우보다 연소영역이 확대된다. The basic flow configuration is composed of a plane, double shear layer where relatively thin mid gas layer is sandwiched between air and fuel stream. The present study describes numerical investigations concerning the combustion enhancement according to a variation of mid layer thickness. In this case, the effect of heat release in turbulent mixing layers is important. For the numerical solution, a fully conservative unsteady <TEX>$2^{nd}$</TEX> order time accurate sub-iteration method and <TEX>$2^{nd}$</TEX> order TVD scheme are used with the finite volume method including k-<TEX>${omega}$</TEX> SST model. The results consists of three categories; single shear layer consists of fuel and air, inert gas sandwiched between fuel and air, cold fuel gas sandwiched between fuel and air. The numerical calculations has been carried out in case of 1, 2, 4 mm of mid layer thickness. The height of total gas stream is 4 cm. The combustion region is broadened in case of inert gas layer of 2, 4 mm thickness and cold fuel layer of 4 mm thickness compared with single shear layer." @default.
- W2000882030 created "2016-06-24" @default.
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- W2000882030 date "2015-02-01" @default.
- W2000882030 modified "2023-10-01" @default.
- W2000882030 title "A Study on the Effect of Mid Layer on Supersonic 2D Double Shear Layer" @default.
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- W2000882030 doi "https://doi.org/10.6108/kspe.2015.19.1.009" @default.
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