The performance of an axial flow fan in a small scale A-frame test facility.

[摘要] ENGLISH ABSTRACT: This thesis investigated the performance of the B2 axial flow fan at different operating points and at two fan speeds in an A-frame configuration. For this purpose, a test facility consisting of a forced draft fan configuration discharging into an A-frame plenum chamber (referred to as a modular, scaled air-cooled condenser or MSACC) was designed and manufactured. Using the fan performance curves and experimental results for the heat exchanger model, the operating range of the test facility was determined to be within the peak efficiency range of the B2-fan as tested in the BS 848 test facility. The results from the experiments show that there is correlation between the static pressure, power consumption and static efficiency of the B2-fan in the MSACC and BS848 test facilities.The inlet velocity and outlet velocities were measured using anemometers. With calibration data obtained using a built forced draft wind tunnel, the outlet volumetric flow rate and static pressure distribution across the MSACC's A-frame. The results also show that there is a maldistribution in the air exit velocity due to the presence of the fan's outlet swirl. The MSACC provides a unique test bench for testing the performance of future air-cooled condenser and axial flow fan designs. Furthermore, it also provides a platform to study installation and environmental factors that influence the aerodynamic and structural performance of an air-cooled condenser fan.

[发布机构] Stellenbosch University