Accession Number : AD0687632

Title :   EFFECT OF STABILIZER GEOMETRY AND FLOW VELOCITY ON VIBRATION COMBUSTION,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Abrukov,S. A. ; Gunko,B. N. ; Mezdrikov,V. N. ; Podymov,V. N.

Report Date : 05 MAR 1969

Pagination or Media Count : 9

Abstract : Preliminary experimental data are given on the effect which stabilizer geometry has on vibration combustion at low flow velocities. The experiments were done on an installation with a combustion chamber in the form of a quartz tube 1 meter in length with one end inserted into a metal container. Holes in this container were used for fuel and air supply and for mounting the pressure gauge and stabilizer rod. The stabilizers tested were conical and axially symmetric. The quartz combustion tube was held in the vertical position with the metal container at the lower end. A mixture of propane and air in a constant ratio of 1:21 was used as the fuel. A piezoelectric barium titanate pickup was for registration of oscillations in pressure. The signals from this pickup were sent through a VZ-4 amplifier to a 2KO-1 oscillograph. Graphs were plotted for indices of vibration combustion as a function of stabilizer parameters at a given flow velocity. It was found that when the engagement factor is fairly high (0.8-0.9) the acoustic properties of the system are determined only by that section of the tube which contains the products of combustion from the edge of the stabilizer to the upper cone of the tube. The author concludes that experiments showed the basic dependence of flame height on vibration frequency and the existence conditions of vibration combustion are most favorable if the contact period equals 0.78-0.87 and the flow velocities are great enough. (Author)

Descriptors :   (*COMBUSTION, STABILITY), VIBRATION, OSCILLATION, GAS FLOW, VELOCITY, PRESSURE, COMBUSTION CHAMBERS, QUARTZ, COMBUSTION CHAMBER GASES, FUELS, PROPANE, AIR, IGNITION, FLAMES, PIEZOELECTRIC GAGES, OSCILLOGRAPHS, ACOUSTIC PROPERTIES, GRAPHICS, USSR

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE