Example Case 2 - Axial Fan

Design Specifications

Volume flow rate = 0.0244 m3/s
Shaft speed = 12000 RPM
Total Pressure Rise = 280 Pa
Number of Blades = 10
Outer diameter = 60.2 mm

3D Blade Parameterisation

Leading edge loading at hub
Leading edge loading at Shroud
Slope of the hub loading distribution
Slope of the shroud loading distribution
Leading edge position at Hub (M4_LE_Hub)
Leading edge position at Shroud(M4_LE_Shroud)

case-2---axial-fan-2

Multi-point, Multi-objective Optimization

Operating Point	OP1	OP2	OP3
Mass flow % of Design Point	100	84.0	110.6

Constraints

Objectives

Maximum pressure rise at OP3 < 220 Pa

Minimise tone noise

Maximise OP1 total-total efficiency

Maximise OP2 total-total efficiency

Fast, Affordable High-Fidelity Simulation, RRS with CAE

Initial Design Matrix of 40
RRS adds 17 points to the design space
57 candidates in total, at 3 operating points
57 x 3 = 170 CFD calculations
Total of 19 hours on 32 cores on Xeon workstation

case-2---axial-fan-3

Multi-point, Multi-objective Optimization Results

case-2---axial-fan-4.1

case-2---axial-fan-4.2