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http://dx.doi.org/10.15435/JILASSKR.2017.22.2.62

A Study on Dynamic Characteristics of Gas Centered Swirl Coaxial Injector Varying Tangential Inlet Diameter with Liquid Pulsation  

Oh, Sukil (서울대학교 기계항공공학부)
Park, Gujeong (서울대학교 기계항공공학부)
Kim, Seongju (서울대학교 기계항공공학부)
Lee, Hyeongwon (서울대학교 기계항공공학부)
Yoon, Youngbin (서울대학교 항공우주신기술연구소(IAAT))
Choi, Jeong-Yeol (부산대학교 항공우주공학부)
Publication Information
Journal of ILASS-Korea / v.22, no.2, 2017 , pp. 62-68 More about this Journal
Abstract
It is important to study on the combustion instability to develop liquid rocket engines for preventing lower combustion efficiency and destruction of combustion chamber. There are many researches on simplex injector with liquid pulsation to solve this problem. In real rocket engine system, however, they use coaxial injectors. Therefore, research on coaxial injector with liquid pulsation is essential. In this study, we investigate dynamic characteristics of gas centered swirl coaxial injector varying tangential inlet diameter. A mechanical pulsator was used to generate an excitation in the liquid flow, and the response characteristics of the injector were confirmed. As tangential inlet diameter increased, mass flow rates increased and spray angle decreased. As tangential inlet diamter decreased, gain decreased because the pressure fluctuation in the injector manifold rarely passed through the inlet. Additionally, it was confirmed that a sufficiently small tangential inlet served as a damper.
Keywords
Liquid rocket engine; Gas centered swirl coaxial injector; Dynamic characteristics; Liquid pulsation;
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Times Cited By KSCI : 1  (Citation Analysis)
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