Dynamic Flow Study in a Catalytic Converter Using Laser Doppler Velocimetry and High Speed Flow Visualization

1995 ◽  
Author(s):  
Kwangsup Hwang ◽  
Keunchul Lee ◽  
John Mueller ◽  
Tom Stuecken ◽  
Harold J. Schock ◽  
...  
Keyword(s):  
Flow Visualization ◽  
Laser Doppler Velocimetry ◽  
High Speed ◽  
Catalytic Converter ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Dynamic Flow ◽  
High Speed Flow ◽  
Speed Flow ◽  
Flow Study

Quantification of turbulence in cryogenic liquid using high speed flow visualization

2016 ◽  
Vol 42 ◽  
pp. 70-81 ◽  
Author(s):  
Nirupama Gopalaswami ◽  
Delphine M. Laboureur ◽  
Ray A. Mentzer ◽  
M. Sam Mannan
Keyword(s):  
Flow Visualization ◽  
High Speed ◽  
Cryogenic Liquid ◽  
High Speed Flow ◽  
Speed Flow

scholarly journals Laser Doppler Velocimetry Characterization of Unsteady Vaned Diffuser Flow in a Centrifugal Compressor

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
William J. Gooding ◽  
John C. Fabian ◽  
Nicole L. Key
Keyword(s):  
Centrifugal Compressor ◽  
Laser Doppler Velocimetry ◽  
High Speed ◽  
Pressure Rise ◽  
Laser Doppler ◽  
Wake Flow ◽  
Quality Data ◽  
Doppler Velocimetry ◽  
Design Development ◽  
Complex Flow

Abstract Modern turbomachinery faces increased performance demands in terms of efficiency, compactness, and pressure-rise. Advancements in computational technology have allowed numerical methods to become the backbone of design development efforts. However, the unique complexities of centrifugal compressor flow-fields pose difficult computational problems. As such, advanced experimental methods must be used to obtain high-quality data sets to further inform, improve, and validate computational methods in complex flow regimes. A recent experimental work on a high-speed centrifugal compressor has provided detailed, unsteady, three-component velocity data using laser Doppler velocimetry. A passage vortex is present, and its nascent tied to the increased incidence at mid-span associated with impeller wake flow. This vortex begins in the hub-pressure side corner and grows to fill the passage and become temporally stable. The vortex development is unsteady in nature, and the unsteady effects persist 40% downstream of the throat. Distinct jet and wake flow patterns from the impeller also do not agglomerate until 40% downstream of the throat. Additionally, the critical impact of the unsteady flow development on the time-averaged flow-field is explained.

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