Study on vortex flow control of inlet distortion

1992 ◽  
Vol 8 (6) ◽  
pp. 1266-1272 ◽  
Author(s):  
Bernhard H. Anderson ◽  
Pao S. Huang ◽  
William A. Paschal ◽  
Enrico Cavatorta
Keyword(s):  
Flow Control ◽  
Vortex Flow ◽  
Inlet Distortion

Mechanism and Flow Control on the Mismatching of Impeller and Vaned Diffuser Caused by Inlet Prewhirl for Centrifugal Compressors

2016 ◽  
Author(s):  
Qiangqiang Huang ◽  
Xinqian Zheng ◽  
Aolin Wang
Keyword(s):  
Flow Control ◽  
Control Method ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Vaned Diffuser ◽  
Inlet Distortion ◽  
Computational Fluid Dynamics Cfd ◽  
Stagger Angle ◽  
Good Agreement ◽  
Matching Relation

Air often flows into compressors with inlet prewhirl, because it will obtain a circumferential component of velocity via inlet distortion or swirl generators such as inlet guide vanes. A lot of research has shown that inlet prewhirl does influence the characteristics of components, but the change of the matching relation between the components caused by inlet prewhirl is still unclear. This paper investigates the influence of inlet prewhirl on the matching of the impeller and the diffuser and proposes a flow control method to cure mismatching. The approach combines steady three-dimensional Reynolds-averaged Navier-Stokes (RANS) simulations with theoretical analysis and modeling. The result shows that a compressor whose impeller and diffuser match well at zero prewhirl will go to mismatching at non-zero prewhirl. The diffuser throat gets too large to match the impeller at positive prewhirl and gets too small for matching at negative prewhirl. The choking mass flow of the impeller is more sensitive to inlet prewhirl than that of the diffuser, which is the main reason for the mismatching. To cure the mismatching via adjusting the diffuser vanes stagger angle, a one-dimensional method based on incidence matching has been proposed to yield a control schedule for adjusting the diffuser. The optimal stagger angle predicted by analytical method has good agreement with that predicted by computational fluid dynamics (CFD). The compressor is able to operate efficiently in a much broader flow range with the control schedule. The flow range, where the efficiency is above 80%, of the datum compressor and the compressor only employing inlet prewhirl and no control are just 25.3% and 31.8%, respectively. For the compressor following the control schedule, the flow range is improved up to 46.5%. This paper also provides the perspective of components matching to think about inlet distortion.

Vortex Flow Controllers in Sanitary Engineering

1984 ◽  
Vol 106 (2) ◽  
pp. 129-133 ◽  
Author(s):  
H. Brombach
Keyword(s):  
Flow Control ◽  
Flow Pattern ◽  
Flow Resistance ◽  
Vortex Flow ◽  
Vortex Chamber ◽  
Control Problems ◽  
Inlet Port ◽  
Input Pressure ◽  
Conical Vortex ◽  
Moving Parts

Flow control problems in combined sewerage systems can be solved with the aid of a new variation of the vortex amplifier. This valve has no moving parts, and comes under the category of pure fluidics; it has a conical vortex chamber and a single inlet port. Depending on the level of water in the vortex chamber the flow pattern may be either axially symmetrical or axially asymmetrical. This effect enables the device to alter its flow resistance in response to the input pressure. Several hundred of this type of the flow controller are already in operation. An example of their application is described below.

scholarly journals Vortex flow on the wing of aircraft and flow control to improve lift properties

2019 ◽  
Vol 1268 ◽  
pp. 012067 ◽  
Author(s):  
E E Mamonova ◽  
V G Soudakov ◽  
A V Voyevodin
Keyword(s):  
Flow Control ◽  
Vortex Flow

Forebody vortex flow control on a high speed transport configuration

1997 ◽  
Author(s):  
Brian Parker ◽  
Robert Eidson ◽  
Timothy Takahashi ◽  
Brian Parker ◽  
Robert Eidson ◽  
...  
Keyword(s):  
Flow Control ◽  
High Speed ◽  
Vortex Flow

Fuzzy logic based forebody vortex flow control

1997 ◽  
Author(s):  
Jin Suzuki ◽  
John Valasek ◽  
Jin Suzuki ◽  
John Valasek
Keyword(s):  
Fuzzy Logic ◽  
Flow Control ◽  
Vortex Flow
Sign in / Sign up

Export Citation Format

Share Document