Consequences of Stalled Vortex Generators on Diffuser Separation

In summary, the consequence of the vortex generators stalling would be a potential reduction in system performance and efficiency as they would no longer delay diffuser separation."
  • #1
JD88
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If I am using vortex generators in an attempt to delay diffuser separation what would the consequence be of the vortex generators stalling? For instance if I set them at and angle of attack to the flow that was past the stall point.
 
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  • #2
I would imagine that the "stalling" of the generators would create distortion which would kill your pressure recovery. There has been quite a bit of research in this area. Have you done any looking into journal articles or papers? ASME's journal of turbomachinery is a very good resource as is AIAA's journal sources.
 
  • #3


Well, if the vortex generators stall, it means they are no longer generating vortices and therefore not fulfilling their intended purpose of delaying diffuser separation. This could result in an earlier separation of the diffuser and potentially lead to reduced performance and efficiency of the system. It's important to carefully design and test the placement and angle of the vortex generators to ensure they do not stall and continue to effectively generate vortices.
 

1. What is a stalled vortex generator?

A stalled vortex generator is a small device that is placed on the surface of an airfoil or diffuser. It creates small vortices which help to control the flow of air and improve aerodynamic performance. When a vortex generator is stalled, it is not able to create the desired vortices, leading to potential separation of the airflow.

2. How do stalled vortex generators affect diffuser separation?

Stalled vortex generators can have a significant impact on diffuser separation. When the vortices created by the generators are not strong enough, the airflow may separate from the surface of the diffuser. This can result in reduced efficiency and increased drag, leading to decreased performance of the diffuser.

3. What are the main consequences of stalled vortex generators on diffuser separation?

The main consequences of stalled vortex generators on diffuser separation include decreased aerodynamic efficiency, increased drag, and reduced performance of the diffuser. This can lead to decreased overall performance of the aircraft or other aerodynamic device.

4. How can stalled vortex generators be prevented?

To prevent stalled vortex generators, it is important to carefully design and place the generators on the surface of the airfoil or diffuser. The shape, size, and placement of the generators can all affect their ability to create vortices and prevent separation. Proper maintenance and regular inspection can also help to prevent stalling.

5. Are there any advantages to using stalled vortex generators?

Yes, there are several advantages to using stalled vortex generators. When properly designed and placed, they can improve aerodynamic performance, increase lift, and reduce drag. However, if the generators are not functioning properly, they can have negative consequences on diffuser separation and overall performance.

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