A compressor active flow control method based on periodic pulsating suction
An active flow control and compressor technology, applied in the aviation field, can solve problems such as flow instability, achieve the effect of improving aerodynamic performance and working indicators, and practical engineering application value in the near future
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment approach 1
[0012] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a method for controlling the active flow of a compressor based on periodic pulsating suction described in this embodiment is realized through the following steps:
[0013] Step 1. Preliminarily simulate the flow field of the compressor through theoretical analysis and numerical simulation to obtain the three-dimensional flow characteristics and flow vortex structure inside the compressor;
[0014] Step 2. According to the three-dimensional flow characteristics in the compressor flow channel obtained in step 1, select the suction position, suction flow rate, suction mode and suction frequency;
[0015] Step 3, establishing the relationship between the frequency characteristics of the vortex structure in the cascade and the frequency characteristics of the periodic pulsating suction excitation;
[0016] Step 4. According to the influence of the flow field changes caused by unsteady excitati...
Embodiment
[0022] combine image 3 with Figure 4 Illustrative example:
[0023] At an angle of attack of +10°, a numerical simulation was performed on a high-load compressor cascade, and the flow characteristics of the cascade under different suction schemes were compared. Given that the inlet pressure of the cascade is (relative to atmospheric pressure) 2500Pa, the outlet pressure is 0Pa (relative to atmospheric pressure), the suction pressure of the suction groove is pulsating pressure, and the suction back pressure within a time period is set as image 3 As shown, the pulsation amplitude is ±1000Pa, and periodic pulsation suction is performed according to the sinusoidal law. The suction groove is 70% of the axial chord length from the leading edge.
[0024] The total pressure loss is defined as: C p =(P 0 -P) / P v0 .
[0025] Among them, P 0 is the total pressure at the cascade inlet, P is the total pressure at the cascade outlet, P v0 is the dynamic pressure at the cascade i...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More