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HIGH PRESSURE IGNITION.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK
Research was continued on a study of the physical processes which govern the ignition, by rapid compression, of hydraulic fluids. Tests were conducted to measure gas and wall temperature in a 38 I.D. horizontal tube 5 ft. long for a range of release pressures and pressure rise rates. Tests were conducted to compare the gas temperature in a vertically and a horizontally aligned 38 I.D. test section. Calculations were made in an attempt to evaluate the con vection heat transfer coefficients for the cool ing period following the compression of the gas. Gas temperatures were calculated for a number of pressure rise rates in a 38 I.D. test section, 5 1long with a final pressure at the end of the compression process of 525 psig. The agree ment between these calculated temperatures and the experimentally obtained true gas tempera tures found by extrapolating the indicated temperatures given by two thermocouples of different diameter was found to be reasonably good. Due to the design of the thermocouple probes the temperature field at some locations in the driven gas was distributed. This neces sitated some redesign of the instrumentation which seems to have eliminated the difficulty. Also see AD 417 599 to 417 602 and AD 417 604 to 417 614. Author
Progress rept. no. 5, 27 Mar-27 May 61,