Density, Compressibility, Thermal Conductivity, and Mechanical Movement of Solid Hydrazine
Abstract
Thermophysical properties and mechanical movement of solid hydrazine in tubes were determined under various conditions. The density, rho sub s, of solid hydrazine was measured at various temperatures, and the results were fitted into rho sub s(g/ml)=1.1869 - 0.000675 t, where t is temperature in C. The melting point of hydrazine increases with pressure by 0.00945 C/atm, but if the pressurization is accomplished with gaseous nitrogen, a slightly smaller increase occurs. Thus, at 40.83 atm of nitrogen, the increase in the melting temperature is 0.38 C. The compressibility coefficient, Beta sub s, of solid hydrazine was measured at various temperatures and pressures to obtain Beta sub s = .0001 cu ft atm, which is independent of temperature from -30 to -4C and pressure from 0 to 30 lb/sq in. The thermal conductivity of solid hydrazine was also measured; the result is .000252 Btu(sec ft F). The foregoing values (except the elevation of freezing point) were compared with the corresponding values for liquid hydrazine. The rates of movement of solid hydrazine in straight and 120 degree -bent tubes at various temperatures by pressure exerted from one end were measured. The water added in hydrazine permits easier movement of solid because of the presence of eutectic liquid particles distributed in the solid. Extensive results on the gliding behavior are summarized. Recommendations are made to alleviate stresses caused by freezing and melting of hydrazine in confining tubes and valves.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1976
- Accession Number
- ADA042039
Entities
People
- E. T. Chang
- N. A. Gokcen
- T. M. Poston
Organizations
- The Aerospace Corporation