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http://dx.doi.org/10.20910/JASE.2022.16.4.1

Design Factor Analysis of Aerospike Pintle Nozzle for Increasing Thrust in Off-Design  

Kim, Jeongjin (Agency for Defense Development, Missile Research Institute, 1st Directorate)
Publication Information
Journal of Aerospace System Engineering / v.16, no.4, 2022 , pp. 1-9 More about this Journal
Abstract
A design factor analysis was conducted to reduce the thrust reduction in the off-design, due to the driving of the aerospike pintle nozzle. The close (NPR 100) as well as the open (NPR 11) stroke were fixed, as under-expansion conditions. The pintle contour, pintle head radius (R), cowl angle (θ), and cowl exit length (L) were selected as design factors. The change in thrust was analyzed, using a verified numerical analysis technique. First, the pintle head radius and the length of the cowl exit had little influence on the thrust. The cowl angle changed the mass flow rate by affecting the effective nozzle throat area, and created a reverse pressure gradient at the cowl exit. As a result of applying the dual aerospike contour, it was confirmed that the thrust in the design-off increased by approximately 1.2%, compared to the reference case and by approximately 3.4% compared to the worst case.
Keywords
Aerospike Pintle Nozzle; Pintle Contour; Cowl Shape; Dual Aerospike;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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