Author(s): L. A. Salami
Linked Author(s):
Keywords: No Keywords
Abstract: Major problems in obtaining the in-situ performance of large axial flow fans are due to the poor accuracy with which relevant parameters could be measured. The paper is suggesting that more reliancebe placed on modei testing and it examines the problem with this approach. It showed that model testing of fan at present is only slightly better thani n-situ testing due mainly to difficuities of flow rate and total head measurements. It suggests hydraulic testing of fans to overcome these difficulties. It also identifies parameters that may affect secondary flow and suggests a way of ensuring that the factors responsible for the generation of secondary flow are similar. In order to predict prototype performance from model test resalts the paper recommends a scale formu1a which reflects the aerofoil characteristics of the blades. Suggestions are also made on flow conditions that must be satisfied at the site in order to enable the model test results to serve as a basis for the prediction of the prototype performance.
Year: 1985