Measurements and designs related to electrical spray modification in a T-56 combustor
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Authors
Shavit, Zeev
Subjects
Particle measurment
Sauter Mean Diameter
T56 combustor
electrostatic atomization
alternative fuels
Sauter Mean Diameter
T56 combustor
electrostatic atomization
alternative fuels
Advisors
Date of Issue
1985-12
Date
1985-12
Publisher
Monterey, California. Naval Postgraduate School
Language
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, combustor's 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
Type
Technical Report
Description
Series/Report No
Department
Organization
Identifiers
NPS Report Number
NPS67-85-012CR
NPS67-85-012CR-A
NPS67-85-012CR-A
Sponsors
sponsored by NAVAIR on Advanced Aircraft
Propulsion Systems and is under the cognizance of Professor 0. Biblarz and
J. A. Miller
Funding
N62271-84-M-3039
Format
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.