Accession Number:

ADA164292

Title:

Measurements and Designs Related to Electrical Spray Modification in a T-56 Combustor.

Descriptive Note:

Contractor rept. Aug 84-Sep 85,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1985-12-01

Pagination or Media Count:

58.0

Abstract:

A new optical technique for measuring Sauter Mean Diameter changes of a fuel spray under an electrostatic field was checked, calibrated, and implemented. The optical technique is based on measuring scattered light at two angles using a variable focal length apparatus. Special attention was given to improving the electrical control loop parameters in order to minimize measurement errors. In order to measure more realistically the effects of the electrostatic probe inside a gas turbine combustor, a pressure chamber was added to the outlet of the present combustion simulation device. Hot tests were carried out with diesel fuel DF-2. Pressure chamber, combustors temperatures, fuel, and air mass flow rates, were recorded together with the voltage applied at the electrode. Results of the cold tests with the new optical device show a Sauter Mean Diameter of 50.0 micron at fuel pressure DF-2 of 100 psi, 51.7 micron at 125 psi and 47.8 micron at 80 psi. The device could not resolve changes while the high voltage field was exerted. Combustion temperatures with the pressure chamber are presented. Preliminary designs for improvements of the various devices are also described. Keywords Particle measurement Sauter mean diameter, T56 jet engine combustors Electrostatic atomization Alternative fuels Optical radiometers.

Subject Categories:

  • Optical Detection and Detectors
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE