[논문]기체주입식 분사기의 이상유동 변화와 분무특성에 관한 연구

이강영; 정하동; 강철웅; 안규복

doi:10.15435/jilasskr.2022.27.3.144

[국내논문] 기체주입식 분사기의 이상유동 변화와 분무특성에 관한 연구
A Study on the Two-Phase Flow Transition and Atomization Characteristics in Effervescent Injectors 원문보기

한국분무공학회지 = Journal of ilass-korea, v.27 no.3, 2022년, pp.144 - 154

이강영 (충북대학교 기계공학부) , 정하동 (충북대학교 기계공학부) , 강철웅 (충북대학교 기계공학부) , 안규복 (충북대학교 기계공학부)

Abstract ▼ AI-Helper

Gas injection is a technique applied to improve throttling in liquid rocket engines and atomization in effervescent injectors. When a gas is injected into a liquid, it creates a two-phase flow inside the injector. The changes (bubbly flow, slug flow, annular flow, etc.) in the two-phase flow affect the injector's spray characteristics. In this study, cold-flow tests were performed by using three injectors with different orifice diameters and four aerators with different gas injection hole diameters. The experiments were done by changing the thrust ratio (liquid mass flow rate ratio) and gas-liquid mass flow rate ratio. Two-phase flow transition, breakup length, and discharge coefficient according to the injector/aerator design and flow conditions were investigated in detail.

주제어

표/그림 (12)

그림 Fig. 1 Transition of two-phase flow
그림 Fig. 2 Schematic of each aerator design and injector assembly
그림 Fig. 3 Schematic of experimental setup
표 Table 1 Experimental condition
그림 Fig. 4 Transition of injector internal flow according to TR and GLR
그림 Fig. 5 Injector internal two-phase flow map for each aerator and injector
그림 Fig. 6 Transition of two-phase flow spray pattern according to TR and GLR
그림 Fig. 7 Spray map of two-phase flow for each aerator and injector
그림 Fig. 8 Breakup length measurement through image binarization
그림 Fig. 9 Average breakup length normalized by d_inj
그림 Fig. 10 Injection pressure drop for d_inj = 1.0 mm
그림 Fig. 11 Discharge coefficient for d_inj = 1.0 mm

참고문헌 (18)

M. J. Casiano, J. R. Hulka and V. Yang, "Liquid-propellant rocket engine throttling: a comprehensive review", Journal of propulsion and power, Vol. 26, No. 5, 2010, pp. 897~923.

상세보기
G. A. Dressler, "Summary of deep throttling rocket engines with emphasis on Apollo LMDE", 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006, pp. 5220.
W. A. Tomazic, "Rocket-engine throttling", NACA, No. NACA-RM-E55J20, 1955.
G. Morrell, "Rocket thrust variation with foamed liquid propellant", NACA, No. NACA-RM-E56K27, 1957.
J. G. Rivard, "New techniques for throttleable bipropellant rocket engines", Propulsion Joint Specialist Conference, 1965, pp. 560.
S. D. Sovani, P. E. Sojka and A. H. Lefebvre, "Effervescent atomization", Progress in Energy and Combustion Science, Vol. 27, No. 4, 2001, pp. 483~521.

상세보기
W. Lee, D. Hwang, K. Ahn and Y. Yoon, "Spray characteristics of effervescent swirl injectors for variable thrust", Journal of the Korea Society of Propulsion Engineers, Vol. 23, No. 2, 2019, pp. 1~12.
Y. Taitel, D. Barnea and A. E Dukler, "Modelling flow pattern transitions for steady upward gas-liquid flow in vertical tubes", AIChE Journal, Vol. 26, No. 3, 1980, pp. 345~354.

상세보기
P. Stahle, V. Gaukel and H. P. Schuchmann, "Influence of feed viscosity on the two-phase flow inside the exit orifice of an effervescent atomizer and on resulting spray characteristics", Food Research International, Vol. 77, 2015, pp. 55~62.

상세보기
R. C. Stechman, J. Oberstone and J. C. Howell, "Design criteria for film cooling small liquid-propellant rocket engines", Journal of Spacecraft and Rockets, Vol. 6, No. 2, 1969, pp. 97~102.
A. H. Lefebvre, "Atomization and sprays", Taylor and Francis, 1989, pp. 155~199.
A. Lichtarowicz, R. K. Duggins and E. Markland, "Discharge coefficient for incompressible non-cavitating flow through long orifices", Journal of Mechanical Engineering Science, Vol. 7, No. 2, 1965, pp. 210~219.
T. C. Roesler and A. H. Lefebvre, "Studies on aerated-liquid atomization", International Journal of Turbo and Jet Engines, Vol. 6, No. 3-4, 1989, pp. 221~230.

상세보기
D. Chisholm, "Pressure gradients due to friction during the flow of evaporating two-phase mixtures in smooth tubes and channels", International Journal of Heat and Mass Transfer, Vol. 16, No. 2, 1973, pp. 347~358.

상세보기
M. A. Woldesemayat and A. J. Ghajar, "Comparison of void fraction correlations for different flow patterns in horizontal and upward inclined pipes", International Journal of Multiphase Flow, Vol. 33, No. 4, 2007, pp. 347~370.

상세보기
D. Chisholm, "Void fraction during two-phase flow", Journal of Mechanical Engineering Science, Vol. 15, No. 3, 1973, pp. 235~236.

상세보기
D. Chisholm, "Two-phase flow in heat exchangers and pipelines", Heat Transfer Engineering, Vol. 6, No. 2, 1985, pp. 48~57.

상세보기
W. Lee, Y. Yoon and K. Ahn, "A study on the thrust throttling using gas injection in swirl injectors", Journal of ILASS-Korea, Vol. 23, No. 4, 2018, pp. 159~168.

원문보기 상세보기

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증