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http://dx.doi.org/10.6108/KSPE.2018.22.5.066

A Numerical Study on Performance Characteristics of STED with various Pressure Ratios and Cone Shapes using Burnt Gas Properties  

Yu, Seongha (School of Mechanical Engineering, Chungnam National University)
Jo, Seonghwi (School of Mechanical Engineering, Chungnam National University)
Kim, Hongjip (School of Mechanical Engineering, Chungnam National University)
Ko, Youngsung (School of Aerospace Engineering, Chungnam National University)
Na, Jaejeong (The 4th R&D Institute - 5th Directorate, Agency for Defense Development)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.22, no.5, 2018 , pp. 66-72 More about this Journal
Abstract
A numerical study was conducted to investigate the performance characteristics of a STED with various pressure ratios (PRs) and cone shapes. Due to momentum loss, the pressure in vacuum chamber increased with cone angle for a PR of 75. Also, the STED is started between PRs of 36 and 37 in the case of a cone angle of $15^{\circ}$ and a blockage ratio (BR) of 15%. The results for various PRs and cone shapes are presented, and the optimal cone shape is found to have a cone angle of between $5{\sim}20^{\circ}$ and a BR of between 15~40%.
Keywords
High Altitude Simulation; Second Throat Exhaust Diffuser; Oblique Shock; Cone Angle; Burnt Gas;
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