An Experimental Investigation of Combustion Modulation Techniques for a Solid Fuel Ramjet.

Abstract

An experimental investigation was conducted to examine the effects of inlet air swirl and secondary gas injection on the combustion properties in a solid fuel ramjet. Tests were conducted with both HTPB and PMM fuels in order to obtain general results. The swirl tests were conducted at high and low air mass fluxes with equivalence ratios less than unity. Swirl was found effective for increasing the fuel regression rate but the magnitude was highly dependent upon motor geometry, fuel type and operating environment. The gas injection tests included hydrogen at low equivalence ratios, and nitric oxide and nitrous oxide at high equivalence ratios. Secondary injection generally resulted in increases in combustion pressure in agreement with equilibrium, adiabatic combustion expectations. Keywords: HTPB(Hydroxyl Terminated Polybutadiene); PMM(Polymethyl Methacrylate); Swirl; and Regression rate. (Theses)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1986
Accession Number
ADA172322

Entities

People

  • Stephen R. Lowe

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Autonomy
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Air Masses
  • Alkenes
  • Combustion
  • Control Systems
  • Elements
  • Flow Rate
  • Fuels
  • Geometry
  • Hydrogen
  • Hydroxyl Terminated Polybutadiene
  • Ignition
  • Propulsion Systems
  • Secondary Injection
  • Solid Fuels
  • Thrust
  • United States

Readers

  • Combustion science or combustion engineering.
  • Internal Combustion Engine (ICE) Technology.
  • Rocket Propulsion.