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Computational Aerodynamics and Aeroa...

Ghosh, Debarshee,

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Computational Aerodynamics and Aeroacoustics of Low-Pressure Axial Fans /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Computational Aerodynamics and Aeroacoustics of Low-Pressure Axial Fans // Debarshee Ghosh.
Author:	Ghosh, Debarshee,
Description:	1 electronic resource (99 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-10, Section: A.
Contained By:	Dissertations Abstracts International86-10A.
Subject:	Heat transfer. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31957786
ISBN:	9798311931106

Computational Aerodynamics and Aeroacoustics of Low-Pressure Axial Fans /
Ghosh, Debarshee,

Computational Aerodynamics and Aeroacoustics of Low-Pressure Axial Fans /Debarshee Ghosh. - 1 electronic resource (99 pages)

Source: Dissertations Abstracts International, Volume: 86-10, Section: A.

Electric cooling-fans, or E-fans, play a crucial role in automotive thermal management systems. These fans are typically low-pressure axial fans powered by electric motors. In electric vehicles, cooling-fans generate airflow to reject heat from the coolant circulating through the heat exchanger. These fans are typically operational at low vehicle speeds.Due to increasingly compact underhood spaces, manufacturers seek greater flexibility in fan placement. As a result, cooling-fans are often placed downstream of other underhood components and consequently ingest spatially non-uniform and turbulent flow. Additionally, to achieve greater flexibility in the placement of cooling-fans, multiple small-diameter fans are often arranged in parallel instead of using a single large-diameter fan. Furthermore, in electric vehicles, the absence of masking noise from the internal combustion engine makes the noise produced by cooling-fans more significant.Both rotor blade geometry and inflow conditions-which depend on fan installation-influence turbomachines' aerodynamic performance and noise. This work examines the effects of rotor blade design and installation on the aerodynamic and aeroacoustic performance of low-pressure axial fans using Computational Fluid Dynamics (CFD) and Computational Aeroacoustics (CAA).Four rotor blade designs with varying blade-loading-distributions are generated using the Blade Element Momentum (BEM) method for low-solidity blades. Their aerodynamic performance is evaluated under both uniform and non-uniform inlet flow conditions, using a generic non-uniform profile. The aeroacoustic performance is evaluated numerically only under uniform inflow conditions.Installation effects are studied through four numerical investigations, analyzing the aerodynamic and aeroacoustic impacts of an upstream blockage, parallel operation of two low-pressure axial fans, and reduced inlet bellmouth dimensions. Ultimately, this study summarizes the design process for low-pressure axial fans and typical installation effects.

English

ISBN: 9798311931106Subjects--Topical Terms:

3391367
Heat transfer.

Computational Aerodynamics and Aeroacoustics of Low-Pressure Axial Fans /
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520 $a Electric cooling-fans, or E-fans, play a crucial role in automotive thermal management systems. These fans are typically low-pressure axial fans powered by electric motors. In electric vehicles, cooling-fans generate airflow to reject heat from the coolant circulating through the heat exchanger. These fans are typically operational at low vehicle speeds.Due to increasingly compact underhood spaces, manufacturers seek greater flexibility in fan placement. As a result, cooling-fans are often placed downstream of other underhood components and consequently ingest spatially non-uniform and turbulent flow. Additionally, to achieve greater flexibility in the placement of cooling-fans, multiple small-diameter fans are often arranged in parallel instead of using a single large-diameter fan. Furthermore, in electric vehicles, the absence of masking noise from the internal combustion engine makes the noise produced by cooling-fans more significant.Both rotor blade geometry and inflow conditions-which depend on fan installation-influence turbomachines' aerodynamic performance and noise. This work examines the effects of rotor blade design and installation on the aerodynamic and aeroacoustic performance of low-pressure axial fans using Computational Fluid Dynamics (CFD) and Computational Aeroacoustics (CAA).Four rotor blade designs with varying blade-loading-distributions are generated using the Blade Element Momentum (BEM) method for low-solidity blades. Their aerodynamic performance is evaluated under both uniform and non-uniform inlet flow conditions, using a generic non-uniform profile. The aeroacoustic performance is evaluated numerically only under uniform inflow conditions.Installation effects are studied through four numerical investigations, analyzing the aerodynamic and aeroacoustic impacts of an upstream blockage, parallel operation of two low-pressure axial fans, and reduced inlet bellmouth dimensions. Ultimately, this study summarizes the design process for low-pressure axial fans and typical installation effects.
546 $a English
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650 4 $a Heat transfer. $3 3391367
650 4 $a Cooling. $3 1457878
650 4 $a Fluid dynamics. $3 545210
650 4 $a Air conditioning. $3 660362
650 4 $a Emissions. $3 3559499
650 4 $a Aerodynamics. $3 532569
650 4 $a Electric vehicles. $3 1613392
650 4 $a Design. $3 518875
650 4 $a HVAC. $3 3555644
650 4 $a Batteries. $3 3555267
650 4 $a Python. $3 3201289
650 4 $a Emission standards. $3 3681915
650 4 $a Reynolds number. $3 3681436
650 4 $a Energy consumption. $3 631630
650 4 $a Lithium. $3 1638490
650 4 $a Ventilation. $3 776587
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710 2 $a Chalmers Tekniska Hogskola (Sweden). $e degree granting institution. $3 3770588
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