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Comparative Analysis of Different Grain Configurations for a Multi-thruster Kinetic Warhead
N. Ananthkrishnan,Hyun Ko,K. Sreesankar,R. Chakravarty,V.S. Renganathan 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
The S-DACS multi-thruster warhead consists of 4 divert and 6 attitude thrusters fed from a common gas generator. Successful S-DACS intercept requires careful selection of the internal ballistics (grain configuration, chamber pressure, etc.), the sensors (seeker range, guidance law, etc.) as well as the external ballistics and sizing (booster diameter, S-DACS release velocity, flight time, maneuverability, etc.). These requirements and constraints are inter-dependent making the S-DACS mission analysis and sizing a difficult task. This work explores the connections between the choice of S-DACS grain configuration and sizing with the chamber pressure as a key parameter. Various parameters and center of gravity/ moment of inertia variations are compared for three different S-DACS grain configurations. Keywords: DACS, grain configuration, mission analysis
Analysis of Thermal Choking in Arbitrary Duct with Application to Dual-mode Ramjet Combustor
N. Ananthkrishnan,P. Tarey,Hyun Ko,K. Gopinath,K. Sreesankar 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
Thermal choking is an important phenomenon in ram and scram combustors. A zero-dimensional model is used to analyze Rayleigh flows in real-life combustors that feature volume heat addition due to combustion, area variation, wall heat loss and frictional losses, as well as different fuel injection rates and mixing efficiency. The method is used to analyze the occurrence of thermal choking in a model scramjet combustor and in a realistic dual-mode combustor geometry.