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Combustion instability in an acid-heptane rocket with a pressurized-gas propellant pumping system

Description: Report presenting results of experimental measurements of low-frequency combustion instability of a 300-pound-thrust acid-heptane rocket engine as compared with the trends predicted by an analysis of combustion instability in a rocket engine. Results regarding the chugging frequency, combustion time delay, effect of rocket combustion-chamber characteristic length, effect of throttling, effect of injection velocity, effect of oxidant-fuel ratio, variation of chugging frequency with amplitude of … more
Date: May 1953
Creator: Tischler, Adelbert O. & Bellman, Donald R.
Partner: UNT Libraries Government Documents Department
open access

Use of flame-immersed blades to improve combustion limits and efficiency of a 5-inch diameter connected-pipe, ram-jet combustor

Description: Report presenting the effects of flame-immersed blades on combustion stability and efficiency, which were determined at various combustor-inlet conditions by use of several geometric blade arrangements, two fuels, two fuel-injection systems, and two blade temperatures. Specific combustor configurations with flame-immersed blades showed marked improvement in stability and efficiency. The operational life of the blades was also observed to be excellent.
Date: April 9, 1953
Creator: Male, Donald W.
Partner: UNT Libraries Government Documents Department
open access

Method for estimating combustion efficiency at altitude flight conditions from combustor tests at low pressures

Description: Report presenting the development and use of a chart for use in estimating the combustion efficiency of a turbojet at altitude flight conditions. The combustion efficiency chart is based on the assumption that the corrected gas flows, pressures, and temperatures of engine components other than the combustor are unique functions of corrected engine speed.
Date: August 27, 1953
Creator: Olson, Walter T.; Childs, J. Howard & Scull, Wilfred E.
Partner: UNT Libraries Government Documents Department
open access

Experimental Determination of Gas Motion Accompanying Screeching Combustion in a 6-Inch Simulated Afterburner

Description: Report presenting an investigation to develop screech instrumentation and study the mechanism of screech in a simulated afterburner. Results regarding the screech mechanism, effect of system variables on screech, speculation regarding screech mechanism, and suggested techniques for elimination or control of screech are provided.
Date: December 4, 1953
Creator: Blackshear, Perry L.; Rayle, Warren D. & Tower, Leonard K.
Partner: UNT Libraries Government Documents Department
open access

Effect of Inlet-Air Temperature on Performance of a 16-Inch Ram-Jet Combustor

Description: Report presenting an investigation of the effect of inlet-air temperature on the combustion efficiency of a 16-inch ram-jet engine in a connected-pipe installation. The engine was operated over a range of fuel-air ratios with several different combustor configurations and two fuel types. Configurations tested included a sloping baffle and a can-type combustor in three configurations.
Date: October 29, 1953
Creator: Cervenka, A. J.; Dangle, E. E. & Friedman, Robert
Partner: UNT Libraries Government Documents Department
open access

Effect of Fuel-Air Ratio Concentration in Combustion Zone on Combustion Performance of a 16-Inch Ram-Jet Engine

Description: The results of fuel-air ratio and temperature surveys made in the flame stabilizing zone of a 16-inch ram-jet combustor indicated that the distribution of combustible mixture immediately downstream of a flame holder should be mechanically controlled if a preferred mixture composition is to be maintained in that zone. A sloping-baffle combustor configuration gave combustion efficiencies of 90 percent or greater over a range of fuel-air ratios from 0.010 to 0.045.
Date: April 13, 1953
Creator: Cervenka, A. J.; Bahr, D. W. & Dangle, E. E.
Partner: UNT Libraries Government Documents Department
open access

Theoretical combustion performance of several high-energy fuels for ramjet engines

Description: An analytical evaluation of the air and fuel specific-impulse characteristics of magnesium, magnesium octene-1 slurries, aluminum, aluminum octene-1 slurries, boron, boron octene-1 slurries, carbon, hydrogen, alpha-methylnaphthalene, diborane, pentaborane, and octene-1 is presented. While chemical equilibrium was assumed in the combustion process, the expansion was assumed to occur at fixed composition.
Date: September 14, 1953
Creator: Tower, Leonard K.; Breitwieser, Roland & Gammon, Benson E.
Partner: UNT Libraries Government Documents Department
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