Session: 10-01 Numerical Simulations and Fan Noise

Paper Number: 128775

128775 - Acoustic Evaluation of Forward and Backward Swept Axial Fan Design for Automotive Applications With Identical Aerodynamic Performance 

The acoustic performance of electric cooling fans is of paramount importance in automotive applications, where reducing noise is essential for passenger comfort and vehicle efficiency. Extensive research has explored the characteristics of forward and backward swept blade designs in axial fans. However, these studies have typically compared fans with different aerodynamic performance objectives, making direct comparisons at matched flow rates and pressure conditions challenging.

 

This paper presents a novel approach aimed at addressing this research gap. A collaborative effort between Hanon Systems and ADT (Advanced Design Technology) employed advanced design techniques using inverse design methodology to create axial fans with identical aerodynamic performance while minimizing acoustic emissions. The focus was on investigating and comparing the acoustic behavior of forward and backward swept blade designs in a unique context.

 

The approach involved utilizing advanced turbo design methods and inverse design principles to develop fans that would achieve the same airflow performance with better acoustic characteristics for identical blade dimensions.

 

The first step in this endeavor was to identify the primary factors influencing fan performance and acoustics. A detailed design specification was established, and advanced design optimization techniques, were employed to fine-tune the blade geometry. This precision engineering ensured that the fans would meet the desired specifications while maintaining similar aerodynamic performance.

 

Subsequent simulations and experimental testing were conducted to validate the designs and to compare the aerodynamic and acoustic performance of forward and backward swept cooling fans designed for identical aerodynamic performance. The findings from these tests provided valuable insights into the acoustic aspects of axial fans in the context of automotive applications.

 

This research project serves as a significant contribution to the field of acoustics in the automotive industry. It demonstrates the feasibility of designing axial fans with the same aerodynamic performance characteristics, regardless of blade sweep, through the application of advanced turbo design and inverse design techniques.

 

The outcomes of this project reveal a comprehensive understanding of how blade sweep affects fan performance and acoustics. The collaborative effort between Hanon Systems and ADT showcases the potential of innovative design methods and cutting-edge technology to address complex challenges in fan design and acoustics.

 

The results provide a foundation for the development & choice of more efficient and quieter axial fans for automotive applications, ultimately enhancing passenger comfort and vehicle efficiency. By further optimizing the acoustic performance of these fans, this research contributes to the advancement of automotive technology, reducing noise pollution and improving the overall driving experience.

Presenting Author: Anand Sivaramakrishnan Hanon Systems EFP Deutschland Gmbh

Presenting Author Biography: 2019 Aerodynamic and Aeroacoustics Engineer at Honon Systems in Germany
2017-2019 Research Assistant at the Institute of Fluid Mechanics of the University Erlangen-Nuremberg
2016-2017 Research Assistant at the University of Sherbrooke in Canada
2014-2016 Research Assistant at DLR Braunschweig
2012-2014 Master Student for Computational Sciences at TU Braunschweig

Authors:

Anand Sivaramakrishnan Hanon Systems EFP Deutschland Gmbh
Mihai Bleiziffer Hanon Systems EFP Deutschland Gmbh
Felix Girmscheid Hanon Systems Deutschland GmbH