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Coolant Dump Ejector Design for Sandwich Rocket Nozzle: A parametric study of coolant dump ejector geometry
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A parametrical study is performed of coolant dump gas ejectors for a sandwich rocket

nozzle design. Five geometrical variations are simulated in four ambient conditions

(static, subsonic, supersonic, vacuum) using an in-house CFD solver. The test cases

are compared with a baseline case and the resulting thrust and ISP are evaluated on a

local and global level. A longer dump wall is found to give the best performance in all

ambient cases, with a second possibility of reducing the circumference of the nozzle end

stiffener. The possibility of post-ejection coolant gas combustion is encountered for high

ambient pressure, high subsonic velocity flight.

Place, publisher, year, edition, pages
2013. , 52 p.
Keyword [en]
Coolant gas ejector, CFD, sandwich nozzle, rocket performance
National Category
Aerospace Engineering
URN: urn:nbn:se:kth:diva-128528OAI: diva2:647885
Educational program
Master of Science - Aerospace Engineering
2013-08-12, HPT Library, Brinellvägen 68, Stockholm, 13:00 (English)
Available from: 2013-09-30 Created: 2013-09-12 Last updated: 2013-09-30Bibliographically approved

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