Numerical Sensitivity Analysis of Axial Flow Fan 3D Aerodynamics under Off Design Conditions


Article Preview

Compressor is a crucial component of an engine. Flow through the compressor is intricate and sensitive to the reference frame, geometry of the blade, tip clearance, stator, staging etc. Compressor, though designed for a particular environment, is also expected to show its performance under off design conditions like accelerating flight, landing, take off, climbing etc. The flow in third dimension leads to many complications and ambiguity. Tip aerodynamics, passage flow, and vortex aerodynamics play crucial role in describing the flow through the upper half of the blade and in the tip region, whereas flow over blade surface, trailing edge and the hub will guide the aerodynamic behavior of the rotor blade. This exercise is done for off design environment to study the aforesaid flow characteristics and is carried on an axial flow fan. The performance variation of fan flow under varying flow conditions is analyzed.



Main Theme:

Edited by:

R. Varatharajoo, E. J. Abdullah, D. L. Majid, F. I. Romli, A. S. Mohd Rafie and K. A. Ahmad




P. K. Akula et al., "Numerical Sensitivity Analysis of Axial Flow Fan 3D Aerodynamics under Off Design Conditions", Applied Mechanics and Materials, Vol. 225, pp. 8-12, 2012

Online since:

November 2012




[1] P.M. Sivadas, Design, Fabrication and Testing of Swept Blades in Axial Flow Compressor, M. Tech Thesis work, 2003, Aerospace Engineering, IIT Bombay.

[2] P. B. Salunkhe, Investigations on Stall Inception and its Control under clean and Distorted Inflows in single stage Axial flow fan, Ph. D work, 2010, Aerospace Engineering, IIT Bombay.


[3] Li Yang et al, Internal flow mechanism and experimental research of Low pressure axial fan with forward-skewed blades, Journal of Hydrodynamics, 2008, 20(3), 299-305.


[4] Semiu A. Gbadebo et al , Three-Dimensional Separations in Axial Compressors, Journal of Turbomachinary, ASME, 2005, Vol. 127/331.


[5] Thong Q. Dang, Peter R. Bushnell, Aerodynamics of cross-flow fans and their application to aircraft propulsion and flow control, Progress in Aerospace Sciences, 45 (2009) 1-29.


[6] Janos Vad, Feren Bencze, Three-dimensional flow in axial flow fans of non-free vortex design, International Journal Of Heat And Fluid Flow, 19 (1998) 601-607.


[7] M. Furukawa et al, The Role of Tip Leakage Vortex Breakdown in Compressor Rotor Aerodynamics, Journal of Turbomachinary, ASME, 1999, Vol. 121 / 469.


[8] Li Wei et al, Numerical simulation of active control on tip leakage flow in Axial turbine, Chinese Journal of Aeronautics, 22 (2009) 129-137.


[9] Lars Sommer, Dieter Bestle, Curvature driven 2D multi-objective optimization of compressor blade sections, Aerospace science and Technology 15 (2011) 234-242.


[10] Yong Sang Yoon et al, Influence of Flow Coefficient, Stagger Angle, and Tip Clearance on Tip Vortex in Axial Compressors, Journal of Fluids Engineering , 2006, Vol. 128 / 1275.


[11] Domenico B et al, Computation of tip-leakage flow in a linear compressor cascade with a second-moment turbulence closure, International Journal of Heat & Fluid Flow (2007)587-601.


[12] Shaojuan Geng et al, Circumferential Propagation of Tip Leakage Flow Unsteadiness for a Low-Speed Axial Compressor, Journal of Thermal Science Vol. 18, No. 3, 2009, 202−206.


[13] MA Wei et al, Experimental Study of Corner Stall in a Linear Compressor Cascade, Chinese Journal of Aeronautics, Elsevier, 24 (2011) 235-242.