Grant: Engage Grants Program
University of Ontario Institute of Technology
$25,000.00
Experimental investigation of the flow-sound interaction in automotive pressure release vents
FY 2014-15
Summary
Noise, Vibration & Harshness (NVH) is becoming more significant in today's vehicle manufacturing industry. It is part of the perceived product quality and a key aspect for gaining market advantage. For example, the customers' feeling of their vehicle's doors in terms of the effort it takes to close the doors and the sound they produce are important features that could negatively impact the perceived quality of the vehicle. Since vehicles' cabins today are air tight sealed to prevent unwanted exterior noise from entering the cabin and lowering the perceived quality of the vehicle it is crucial to release any pressure build-up inside the cabin when the windows are closed. The pressure build-up in the cabin is mainly due to the heating, ventilation and air conditioning (HVAC) system or due to the door closure event. Any perceptible increase in the cabin pressure also lowers the perceived quality of the vehicle. Therefore, pressure release vents (or air extractors) are designed and installed in the vehicle's cabin to relieve the steady state airflow from HVAC system and the pressure build-up due to thedoor closure event. However, when one window is open in a vehicle, unsteady flow over the window's opening can result in high levels of pressure pulsation inside the vehicle's cabin. This pressure pulsation, if not vented properly, could cause not only uncomfortable feeling for the vehicle's passengers but also could be a serious health hazard. Wegu manufacturing produces many different pressure release vents (PVR) for the automotive industry. However, some of their vents experienced flutter and generated elevated levels of noise when one of the vehicle's windows was open. Therefore, the main objective of this project is to investigate the flow-sound-structure interaction of the automotive pressure release vents and develop a technique that can be used to dampen the flutter and noise issues that were observed in some of the vents when one of the vehicle's windows was open without affecting their performance during door closure event and/or air-circulation whenthe HVAC system is used.
Program
Engage Grants Program
Location
Ontario, Canada
Recipient Type
Academia
Type
Grant
Source
NSERC's Awards Data
As published
Application id
477049-2014
Name nom
Mohany, Atef
Department département
Engineering and Applied Science, Faculty of
Organization id
19222
Institution établissement
University of Ontario Institute of Technology
Province en
Ontario
Province fr
Ontario
Country en
CANADA
Country fr
CANADA
Fiscal year exercice financier
2014
Competition year année de concours
2014
Award amount
25000
Program id
EGP
Program name en
Engage Grants Program
Program name fr
Programme de subventions d'engagement partenariat
Group en
Research partnerships programs
Group fr
Programmes de partenariat
Committee code
1553
Committee name en
Ontario Internal Decision Committee
Committee name fr
Comité de décision interne pour l'Ontario
Area of application code
500
Area of application group en
Manufacturing processes and products
Area of application group fr
Procédés et produits industriels
Area of application en
Manufacturing processes and products
Area of application fr
Procédés et produits industriels
Research subject code
2200
Research subject group en
Fluid mechanics
Research subject group fr
Mécanique des fluides
Research subject en
Fluid mechanics
Research subject fr
Mécanique des fluides
Partie
1
Nb partie
1
Application title
Experimental investigation of the flow-sound interaction in automotive pressure release vents
Keyword
NSERC
Application summary
Noise, Vibration & Harshness (NVH) is becoming more significant in today's vehicle manufacturing industry. It is part of the perceived product quality and a key aspect for gaining market advantage. For example, the customers' feeling of their vehicle's doors in terms of the effort it takes to close the doors and the sound they produce are important features that could negatively impact the perceived quality of the vehicle. Since vehicles' cabins today are air tight sealed to prevent unwanted exterior noise from entering the cabin and lowering the perceived quality of the vehicle it is crucial to release any pressure build-up inside the cabin when the windows are closed. The pressure build-up in the cabin is mainly due to the heating, ventilation and air conditioning (HVAC) system or due to the door closure event. Any perceptible increase in the cabin pressure also lowers the perceived quality of the vehicle. Therefore, pressure release vents (or air extractors) are designed and installed in the vehicle's cabin to relieve the steady state airflow from HVAC system and the pressure build-up due to thedoor closure event. However, when one window is open in a vehicle, unsteady flow over the window's opening can result in high levels of pressure pulsation inside the vehicle's cabin. This pressure pulsation, if not vented properly, could cause not only uncomfortable feeling for the vehicle's passengers but also could be a serious health hazard. Wegu manufacturing produces many different pressure release vents (PVR) for the automotive industry. However, some of their vents experienced flutter and generated elevated levels of noise when one of the vehicle's windows was open. Therefore, the main objective of this project is to investigate the flow-sound-structure interaction of the automotive pressure release vents and develop a technique that can be used to dampen the flutter and noise issues that were observed in some of the vents when one of the vehicle's windows was open without affecting their performance during door closure event and/or air-circulation whenthe HVAC system is used.
