Evaluation of Foam Coolants.
Final rept. May-Jun 69,
TRW DEFENSE AND SPACE SYSTEMS GROUP REDONDO BEACH CA APPLIED TECHNOLOGY DIV
Pagination or Media Count:
An experimental program was conducted in a nominal 3000 lbf, 300 psia, N2O4-UDMH rocket engine to directly compare the cooling performance of three new foam formulations containing sugar or a micro-sized silica solid or Light Water concentrate and two new liquid formulations containing soluble sodium silicates or a mixture of sugar plus dibasic phosphate a blowing agent with the known cooling results of a protein foam. It was concluded that additives such as fumed silica and a mixture of sugar plus NH42 HP O4 have a slight beneficial effect on coolant capacities. More importantly, coolant efficiency and streaking resistance appeared to be affected more by run duration and rocket engine mechanics such as injector-chamber interaction then by coolant composition. However, the results of the cooling formulation containing its own blowing gas were positive enough to warrant recommending further analytical and experimental testing. Author
- Air Conditioning, Heating, Lighting and Ventilating
- Liquid Rocket Propellants