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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Propulsion Engineers
Journal Basic Information
Journal DOI :
The Korean Society of Propulsion Engineers
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Volume & Issues
Volume 11, Issue 6 - Dec 2007
Volume 11, Issue 5 - Oct 2007
Volume 11, Issue 4 - Aug 2007
Volume 11, Issue 3 - Jun 2007
Volume 11, Issue 2 - Apr 2007
Volume 11, Issue 1 - Feb 2007
Selecting the target year
The study of ignition characteristics of solid propellant using Arc Image Furnace
Yoo, Ji-Chang ; Kim, In-Chul ; Jung, Jung-Yong ; Ko, Seung-Won ; Lee, Kyung-Joo ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 1~8
The objective of the present work is to characterize design parameters of solid propellant ignitor for composite, double base, and nitramine propellants using arc image furnace. Arc image furnace and fiber optics surface reflectometer were used to measure ignition delay time and reflected optical energy of several compositions of composite, double base and nitramine base rocket propellant at different pressure levels each other. The order of ignitability was double base > composite> nitramine propellants at initial pressure of over 75 psia. The highest ignition energy was needed to ignite nitramine propellant, however, the ignition delay time decreased abruptly as the pressure increased up to the range of
psia. The absorbtion of radiation energy could be increased by the addition of small amount of opacifiers as carbon black, ZrC, WC and burning catalyst.
Heat Transfer Characteristics under Recirculation zone of Ramjet Combustor
Lee, Keon-Woo ; Oh, Min-Keun ; Ham, Hee-Chul ; Hwang, Ki-Young ; Cho, Hyung-Hee ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 9~17
This experimental study has been conducted to investigate the effect of the recirculation zone on the multi-slot film cooling in the ramjet combustor. The recirculation zone which is generated by the protrusion tip on the entrance of the coolant flow path affects on the first slot. Velocity fields, dimensionless temperature fields and adiabatic film cooling effectiveness on the downstream wall of the slot exit are measured. The results show that the film cooling performance is rapidly decreased after the slot exit by shear layer and high turbulence intensity between separated flows and coolant flows.
A Study of Localization for Adiabatic Shear Band in WHA(Tungsten Heavy Alloy)
Hwang, Doo-Son ; Hong, Sung-In ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 18~25
In a plastic metal forming of thermally rate-sensitive material, the localized shear band stems from evolution of a narrow region in which intensive plastic flow occurs. And it give rise to fatal fracture with plastic instability. The objectives of this study are to investigate the localization behavior by using numerical method and predict the failure for WHA(Tungsten Heavy Alloy). In this work, the implicit finite difference scheme is used because of the advantage about convergence and the numerical stability. This study is based on an analysed material with hardening as well as thermally softening behavior which includes isotropic strain hardening and observed the extension of localization within shear band according to material properties.
Safety Assessment for Aircraft Engines
Lee, Kang-Yi ; Yoo, Seung-Woo ; Kim, Kui-Soon ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 26~34
The efforts to develop high performance aircraft engines are successively progressed with development of recent technology. The reliability of individual parts and the safety of engine systems are reduced if high efficiency components, high strength materials, and precise controls are applied to the engine with complexity to increase engine performance. In this paper, the regulation requirements and assessment technique for aircraft engine safety are considered, and the result of safety assessment on a turbine case cooling system of high efficiency turbofan engine is presented.
Study on the Rate-of-Loading by the Differential Pressure of Motor Operated Gate Valves in Opening Stroke
Kim, Bum-Nyun ; Hong, Sung-In ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 35~41
The rate of loading in motor operated valve(MOV) can be defined as a variation of correlation between the actuator torque and the thrust upon the variation of operating load. This paper contains the analysis of characteristic and the validity of loading rate in the opening stroke of gate type motor operated valve. Also, this paper describes the evaluation result of loading rate for 40 MOVs' opening stroke using newly derived methodology in this study. Author has found a result that loading rate of opening stroke gets a negative value when the differential pressure is higher than 150 psi and this value goes up depending on the amount of the differential pressure.
Performance Evaluation of Micro-nozzle Using Cold Gas Propulsion System
Jung, Sung-Chul ; Kim, Youn-Ho ; Oh, Hwa-Young ; Myong, Rho-Shin ; Huh, Hwan-Il ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 42~49
In this study, we analyzed flow characteristics of micro-nozzles for basic research to develop micro propulsion system. Cold gas propulsion system was used, and micro-nozzles having nozzle throat diameters of 1.0, 0.5, 0.25 mm were fabricated with EDM method. Thrust was measured through the use of plate-spring and strain gage based thrust measurement system, and flow characteristics of micro-nozzles were analyzed under ambient condition and vacuum condition. We used argon and nitrogen gases as propellant, and compared experimental results with CFD analysis. From the result, we verified the flow losses of viscosity and back-pressure caused by minimization of nozzle.
The Whole Region Pressure Measurement of Cavity Downstream using PSP Technique
Seo, Hyung-Seok ; Oh, Ju-Young ; Jeon, Young-Jin ; Lee, Jae-Woo ; Byun, Yung-Hwan ;
Journal of the Korean Society of Propulsion Engineers, volume 11, issue 6, 2007, Pages 50~57
Pressure Sensitive Paint(PSP) means a reacting paint in pressure. PSP can measure continuous pressure field by analyzing the oxygen quantity using optical method. The surface pressure of down stream after the sonic jet that injected transversely into the supersonic freestream was measured by PSP technique. Moreover the effect of various rectangular shaped cavities in front of the jet was measured by PSP technique. A comparison of the PSP results with conventional pressure tap and CFD indicates good agreement. Until now, the results of numerical analysis were compared with the discrete points such as the results of pressure tap. In this study, the whole region pressure was measured using PSP technique and its results were similar to CFD. Therefore, the flow phenonenon of cavity downstream was clearly grasped.