Flow measurements in a model ramjet secondary combustion chamber

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Journal of Propulsion and Power; (USA)

DOI:https://doi.org/10.2514/3.23278· OSTI ID:6070140

Chittilapilly, L T; Venkateswaran, S; Paul, P J; Mukunda, H S ^[1]

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1. ISRO, Vikram Sarabhai Space Centre, Trivandrum (India) Indian Institute of Science, Bangalore (India)

Experimental studies were conducted on a typical secondary combustion chamber of a ramjet to understand the influence of various inlet parameters such as primary nozzle configuration, secondary air injection angle, and flow Reynolds numbers on the secondary combustion chamber (SCC) performance. Cold flow studies were made with air as the flow medium for both primary and secondary jets followed by similar studies with hot primary jets. The general flow structure in the SCC obtained from surface oil film technique showed recirculation zones near the head end. The combustor length required for jet mixing was found to be unrelated to recirculation zone length confirmed by selective temperature and total pressure profile measurements. The calculated frictional loss from the momentum balance consideration was found to be small. That significant improvement in mixing can be achieved by a choice of multiple-hole primary nozzle configuration has been demonstrated. 11 refs.

• OSTI ID: 6070140
• Journal Information: Journal of Propulsion and Power; (USA), Journal Name: Journal of Propulsion and Power; (USA) Vol. 6; ISSN JPPOE; ISSN 0748-4658
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
COMBUSTION CHAMBERS
ENGINES
FLUID FLOW
GAS FLOW
GEOMETRY
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATHEMATICS
MIXING
NOZZLES
PERFORMANCE
PRESSURE GRADIENTS
RAMJET ENGINES
REYNOLDS NUMBER