충돌 액막 분석을 위한 전기전도 액막 두께 측정장치 최적설계
Optimum Design of a Liquid Film Thickness Measurement Device Using Electric Conductance for Impingement Liquid Film
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초록
To analyze the film cooling in a liquid rocket engine, it is necessary to understand the characteristics of the wall-impingement liquid film. We designed an optimal two-dimensional device for measuring the thickness of the liquid film thickness. This device quantitativelymeasures the liquid-film thickness distribution. In previous liquid-film thickness measuring devices, the liquid film was formed over theentire area of the sensor. However, its formation depended on injection conditions. To compensate for this, optimal resistors are selected. Additionally, saturation variations with partial saturation are analyzed. Furthermore, calibration using the enhanced plate method is con-ducted with improvements in spatial resolution. The device designed here can be used to analyze the properties of an impingement liquidfilm with a slit injector. This study can be used for film-cooling analysis in liquid rocket engines.
Abstract
To analyze the film cooling in a liquid rocket engine, it is necessary to understand the characteristics of the wall-impingement liquid film. We designed an optimal two-dimensional device for measuring the thickness of the liquid film thickness. This device quantitativelymeasures the liquid-film thickness distribution. In previous liquid-film thickness measuring devices, the liquid film was formed over theentire area of the sensor. However, its formation depended on injection conditions. To compensate for this, optimal resistors are selected. Additionally, saturation variations with partial saturation are analyzed. Furthermore, calibration using the enhanced plate method is con-ducted with improvements in spatial resolution. The device designed here can be used to analyze the properties of an impingement liquidfilm with a slit injector. This study can be used for film-cooling analysis in liquid rocket engines.
참고문헌 (7)
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- K. B. Lee, "Feasibility test of a liquid film thickness sensor on a flexible printed circuit board using a three-electrode conductance method", Sensors, 17(1), pp.42~ (2017)
- 이규병, "고정밀 2상유동 액막두께 측정을 위한 연성회로기판 기반 3-전극 센서 개발", 센서학회지, 25(1), pp.57~64 (2016), 한국센서학회[DOI]