ACOUSTIC EVALUATION OF FORWARD AND BACKWARD SWEPT AXIAL FAN DESIGN FOR AUTOMOTIVE APPLICATIONS WITH IDENTICAL AERODYNAMIC PERFORMANCE

This paper introduces a pioneering approach to address a notable research gap in the realm of axial fan design for automotive application. Through a collaborative effort between Hanon Systems and Advanced Design Technology (ADT), advanced design techniques employing inverse design methodology were harnessed to develop axial fans with identical aerodynamic performance while minimizing acoustic emissions. The primary focus was on a comprehensive exploration and comparison of the acoustic behavior exhibited by forward and backward swept blade designs, set within a distinctive context. The methodology encompassed the application of advanced turbomachinery design methods and inverse design principles. This innovative approach aimed to create fans that not only achieved identical airflow performance but also exhibited superior acoustic characteristics, all within the constraints of identical blade dimensions. The initial step involved a meticulous identification of key factors influencing fan performance and acoustics. A detailed design specification was then established, and advanced design optimization techniques were deployed to precisely adjust the blade geometry. This precision engineering ensured that the fans met desired specifications while maintaining similar aerodynamic performance. Subsequent to the design phase, comprehensive simulations and experimental testing were executed to validate the designs. The focus was on comparing the aerodynamic and acoustic performance of forward and backward swept cooling fans, both designed to achieve identical aerodynamic performance. The results from these tests provided valuable insights into the acoustic aspects of axial fans, particularly in the context of automotive applications. This research project stands as a substantial contribution to the field of acoustics in the automotive industry. It not only showcases the feasibility of designing axial fans with identical aerodynamic performance characteristics irrespective of blade sweep but also underscores the efficacy of advanced turbo design and inverse design techniques in achieving this outcome.