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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 temperatures in a 78 in. I. D. horizontal tube 5 ft. long for a range of pressure rise rates and release pressures. Calculations of gas temperatures were made for a 38 in. I.D. x 5 ft. long horizontal test section at a final pressure of 2500 psig. b 78 in. I.D. x 5 ft. long hori zontal test section at final pressures of 525 and 2500 psig. Two different pressure rise rates were employed in the calculations for each pipe size and each final pressure, one representing a relatively rapid compression, the other a relatively slow compression. TE CALCU LATED VALUES OF THE GAS TEMPERATURE WERE THEN COMPARED WITH THE EXPERIMENTALLY DETERMINED VALUES. A survey of the literature was made on the development of a natural convection flow pattern. The results of this investigation have indicated that there is probably sufficient time for the development of such a flow in the process of venting high pressure air into a dead ended section of pipe. Also see AD-417 599 to 417 603 and AD-417 605 to 417 614. Author
Progress rept. no. 6, 28 May-31 July 61,