Accession Number:

AD0860121

Title:

Evaluation of Foam Coolants.

Descriptive Note:

Final rept. May-Jun 69,

Corporate Author:

TRW DEFENSE AND SPACE SYSTEMS GROUP REDONDO BEACH CA APPLIED TECHNOLOGY DIV

Personal Author(s):

Report Date:

1969-07-01

Pagination or Media Count:

95.0

Abstract:

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

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Liquid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE