Study relating to the improvement of centrifugal fan performance with the use of steady air injection at the impeller inlet

Vaclav Cyrus; Petr Wurst; Jan Cyrus

doi:10.29008/ETC2017-107

12^th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2017-107

Main Topic:

Active and passive flow control

https://doi.org/10.29008/ETC2017-107

Authors

Vaclav Cyrus - AHT Energetika Ltd
Petr Wurst - AHT Energetika Ltd
Jan Cyrus - AHT Energetika Ltd.

Abstract

Our paper describes the groundwork results of a study relating to the improvement of a high pressure centrifugal fan performance with the use of steady air injection at the inlet of two types impeller, namely with the forward and backward curved blades. Tests were carried out on a test rig with an external diameter of 400 mm. The maximum efficiency increase of 1.9% to 2.1% was observed in the fan with forward curved blades, if the air jet output was taken into account when carrying out the data analysis. Negative efficiency increment was observed within the Fan B working range.