An Experimental Investigation of the Combustion Behavior of Solid Fuel Ramjets
Author : Grant Allan Begley
Publisher :
Page : 0 pages
File Size : 48,99 MB
Release : 1982
Category : Aeronautics
ISBN :
An Investigation of the Combustion Behavior of Solid Fuel Ramjets
Author : Clemens James Mady (Jr)
Publisher :
Page : 0 pages
File Size : 33,37 MB
Release : 1977
Category : Airplanes
ISBN :
Book Description
An experimental and analytical investigation was conducted of the combustion behavior in solid fuel ramjets. The effects of configuration variables on combustion performance were experimentally determined. Air ducting methods were found to affect combustion efficiency through port flow rates, bypass dump momentum and geometry and bypass ratio. Bypass configurations with plexiglas fuel altered the heat transfer mechanisms within the port and decreased combustion efficiency. The analytical model was found to be in qualitative agreement with experimental data. Finite rate kinetics and radiative transfer to the fuel surface will be required in the model to obtain more quantitative accuracy. (Author).
An Investigation of the Combustion Behavior of Solid Fuel Ramjets
Author : Clemens James Mady (Jr)
Publisher :
Page : 48 pages
File Size : 31,94 MB
Release : 1977
Category : Airplanes
ISBN :
Book Description
An experimental and analytical investigation was conducted of the combustion behavior in solid fuel ramjets. The effects of configuration variables on combustion performance were experimentally determined. Air ducting methods were found to affect combustion efficiency through port flow rates, bypass dump momentum and geometry and bypass ratio. Bypass configurations with plexiglas fuel altered the heat transfer mechanisms within the port and decreased combustion efficiency. The analytical model was found to be in qualitative agreement with experimental data. Finite rate kinetics and radiative transfer to the fuel surface will be required in the model to obtain more quantitative accuracy. (Author).
An Experimental Investigation of the Combustion Behavior of Solid Fuel Ramjets
Author : Grant Allan Begley (Jr)
Publisher :
Page : 34 pages
File Size : 41,99 MB
Release : 1982
Category :
ISBN :
Book Description
Limited experimental data indicated that fuel vapor composition within the SFRJ combustor may have a significant effect on the obtainable combustion efficiency and upon the dependence of combustion efficiency upon equivalence ratio and air mass flow rate. Combustor pressure oscillations in bypass operation were found to increase regression rates when using PMM fuel grains and to increase or decrease combustion efficiency depending upon equivalence ratio.
Combustion Behavior of Solid Fuel Ramjets, Vol. 1. Correlation of Reacting and Non-reacting Flow Characteristics
Author : Brian A. Binn
Publisher :
Page : 0 pages
File Size : 33,27 MB
Release : 1981
Category : Airplanes
ISBN :
Book Description
An experimental investigation was conducted to determine the relationship between the cold flow characteristics of velocity, pressure distribution, and turbulence intensity and the reacting flow performance and combustion characteristics of a solid fuel ramjet. The effects of configuration and air flow changes on the above characteristics were examined. Average regression rates and combustion efficiencies were not significantly affected by changes in configuration. These variations in test conditions significantly affected the centerline turbulence intensity but not the near-wall turbulence intensity in cold flow. Near-wall turbulence profiles in cold flow were found to correlate with the fuel regression profiles in reacting flows. The use of bypass resulted in decreases in regression rate and efficiencies for all cases. (Author).
Application of Light Extinction Measurements to the Study of Combustion in Solid Fuel Ramjets
Author : Michael Edward Hewett
Publisher :
Page : 0 pages
File Size : 45,64 MB
Release : 1978
Category : Airplanes
ISBN :
Book Description
An experimental investigation of the combustion behavior in solid fuel ramjets was conducted. Optical light extinction measurements were employed to determine the effects of fuel composition and bypass ratio on the combustion efficiency, percent and size of unburned carbon, and fuel regression rate. Utility and limitations of the optical method are presented. (Author).
Combustion Behavior of Solid Fuel Ramjets. Volume I. Correlation of Reacting and Non-Reacting Flow Characteristics
Author : Brian A. Binn
Publisher :
Page : 68 pages
File Size : 37,23 MB
Release : 1981
Category :
ISBN :
Book Description
An experimental investigation was conducted to determine the relationship between the cold flow characteristics of velocity, pressure distribution, and turbulence intensity and the reacting flow performance and combustion characteristics of a solid fuel ramjet. The effects of configuration and air flow changes on the above characteristics were examined. Average regression rates and combustion efficiencies were not significantly affected by changes in configuration. These variations in test conditions significantly affected the centerline turbulence intensity but not the near-wall turbulence intensity in cold flow. Near-wall turbulence profiles in cold flow were found to correlate with the fuel regression profiles in reacting flows. The use of bypass resulted in decreases in regression rate and efficiencies for all cases. (Author).
An Investigation of the Combustion Process in Solid Fuel Ramjets
Author : William Vernon Goodwin
Publisher :
Page : 58 pages
File Size : 44,12 MB
Release : 1981
Category : Aeronautics
ISBN :
Book Description
An experimental investigation was conducted into four areas of the solid fuel ramjet combustion process: (1) the effects of near-wall turbulent mixing and equivalence ratio on combustion efficiency, (2) the effects of bypass air on combustion efficiency, (3) the combustion process in a cylindrically perforated fuel grain with a twin side-dump/dome configuration, and (4) the comparison of experimental radial temperature profiles to computer generated radial profiles. Polymethylmethacrylate fuel grains were burned in a ramjet motor and a thrust stand. Combustion efficiencies were determined and compared for different configurations. It was found to be insensitive to variations in the mixture ratio and to near-wall mixing. Bypass air was found to adversely affect the combustion efficiency both in stable and unstable combustion environments. The twin side-dump/dome configuration was unable to sustain combustion for all conditions investigated. Theoretical radial temperature profiles were found to have larger near wall gradients than were measured experimentally. (Author).
An Investigation of the Combustion Process in Solid Fuel Ramjets
Author :
Publisher :
Page : 0 pages
File Size : 32,76 MB
Release : 1981
Category :
ISBN :
Book Description
An experimental investigation was conducted into four areas of the solid fuel ramjet combustion process: (1) the effects of near-wall turbulent mixing and equivalence ratio on combustion efficiency, (2) the effects of bypass air on combustion efficiency, (3) the combustion process in a cylindrically perforated fuel grain with a twin side-dump/dome configuration, and (4) the comparison of experimental radial temperature profiles to computer generated radial profiles. Polymethylmethacrylate fuel grains were burned in a ramjet motor and a thrust stand. Combustion efficiencies were determined and compared for different configurations. It was found to be insensitive to variations in the mixture ratio and to near-wall mixing. Bypass air was found to adversely affect the combustion efficiency both in stable and unstable combustion environments. The twin side-dump/dome configuration was unable to sustain combustion for all conditions investigated. Theoretical radial temperature profiles were found to have larger near wall gradients than were measured experimentally. (Author).
A Comparison of Solid Fuel Ramjet Flow Characteristics and Combustion Behavior
Author : Brian Andrew Binn
Publisher :
Page : 83 pages
File Size : 15,1 MB
Release : 1979
Category : Aeronautics
ISBN :
Book Description
An experimental investigation was conducted to determine if there is a relationship between the cold flow characteristics of velocity, pressure distribution, and turbulence intensity and the reacting flow performance and combustion characteristics of a solid fuel ramjet. The effects of configuration and air flow changes on the above characteristics were examined. Average regression rates and combustion efficiencies were not significantly affected by changes in configuration. These variations in test conditions significantly affected the center-line turbulence intensity but not the near-wall turbulence intensity in cold flow. The use of bypass resulted in decreases in regression rate and efficiencies for all cases. Attainable performance appears to be most strongly related to near-wall turbulence intensity/mixing and to the amount of fuel reaching the aft mixing chamber. (Author).
