A Numerical Study on Reduction of Propellants for Reaction Control Systems with Improvement of Jet Interaction
- Paper number
IAC-10,D2,5,12,x7991
- Author
Mr. Yu Etoh, Kyushu University, Japan
- Coauthor
Prof. Shigeru Aso, Kyushu University, Japan
- Year
2010
- Abstract
For increasing payloads on space planes and missiles, we attempt to reduce the weight of propellants for Reaction Control Systems (RCS). To decrease the fuel mass for RCS, we propose two methods of the injection which are capable of effective utilization of jet interaction. First, a periodic injection is studied to use the high pressure region formed by jet interaction. Second, the idea with two injections is investigated to improve the low pressure region behind the barrel shock by setting the secondary injector port behind the primary injector. These two injection methods are simulated by using the two or three dimensional Reynolds Averaged Navier-Stokes equations coupled with Wilcox’s k-ω turbulence model. The results are followings. In a periodical injection, the high pressure region is observed when the injection is stopped. This indicates the possibility of reduction of RCS fuel consumption because there is no need for contiguous injection. In multi jets, the pressures behind the front jet are increased due to the rear injection, and the size of barrel shock formed by the front injector is reduced. The flow field with multi jets varies according to the mass flow ratio and the distance between two injectors. The comparison with single jet case under the condition that the total mass flow rate are same, the normal force affected by the increased pressures is expected to be about 10 percent higher.
- Abstract document
- Manuscript document
IAC-10,D2,5,12,x7991.pdf (🔒 authorized access only).
To get the manuscript, please contact IAF Secretariat.