Date of Award
2006
Degree Type
Thesis
Degree Name
Master of Engineering Science
Program
Mechanical and Materials Engineering
Supervisor
Dr. Eric Savory
Second Advisor
Dr. Ing. Robert Martinuzzi
Abstract
The research investigates the change in engine-cooling fan performance and aerodynamics due to the interaction with an engine compartment with a circular plate simulating the engine blockage. Two experiments conducted on both a high and low- pressure fan prototype (HPF and LPF) show the difference between the blocked behaviour of the two designs. Measurements of fan performance at varying fan to blockage plate distance provides to within 10-15%. A second experiment captured the three-dimensional flow field using Laser Doppler Velocimetry and showed that the LPF design promotes radial flow, producing 50% more than the HPF. In general, blockages force the flow to the outer tip of the blade causing increased recirculation near the hub. Estimates of blade lift by applying blade element theory with zero inlet tangential velocity show lift is lower than expected. Given the high radial component of velocity, the chord length and camber angle reduce by up to 23% and 26%, respectively. This likely contributes to lost blade lift.
Recommended Citation
Gifford, Nicholas L., "Experimental STUDY OF AUTOMOTIVE COOLING FAN AERODYNAMICS UNDER BLOCKED CONDITIONS" (2006). Digitized Theses. 5090.
https://ir.lib.uwo.ca/digitizedtheses/5090