Assessment of the Impact of a Heterogeneous Stator on the Noise of an Axial-Flow Low Mach-number Stage

2019 ◽  
Author(s):  
Miguel Pestana ◽  
Marlene Sanjose ◽  
Stephane Moreau ◽  
Michel Roger ◽  
Mathieu Gruber
Keyword(s):  
Mach Number ◽  
Axial Flow ◽  
Low Mach Number ◽  
The Impact

Axial Flow Compressor and Turbine Loss Coefficients: A Comparison of Several Parameters

1972 ◽  
Vol 94 (3) ◽  
pp. 193-201 ◽  
Author(s):  
L. E. Brown
Keyword(s):  
Mach Number ◽  
Test Data ◽  
Axial Flow ◽  
Loss Coefficient ◽  
Low Mach Number ◽  
Loss Parameter ◽  
Loss Coefficients ◽  
Flow Compressor ◽  
Stage Efficiency ◽  
Better Than

Many loss parameters are used in the turbomachinery field for correlating the effects on losses of numerous geometric and aerodynamic variables associated with blade rows. The parameter most common to these correlations is the ratio of a loss parameter to a velocity parameter, here called the loss coefficient. Such loss coefficients of different forms used for compressors by Howell and the NACA and those used for turbines by Ainley and Soderberg, plus an additional one, are compared explicitly for possible use in both compressors and turbines. Over a range of Mach numbers, loss coefficient values are compared with loss levels fixed and for representative blading cascade test data, and pressure recoveries and stage efficiencies are compared with loss coefficient values fixed. It is shown that for a low Mach number the different parameters are equal and interchangeable; however, as the Mach number increases, differences appear and grow larger, so that a given combination of loss coefficient value and Mach number implies different entropy-rise values depending upon which parameter is being used. The criteria used here for comparing the different parameters are that one loss coefficient is better than another a– if its loss coefficient values corresponding to test data vary less over a significant range of Mach number, and b– if the stage efficiency implied by a fixed loss coefficient value varies in a more realistic way over a range of Mach number. The Soderberg parameter was found to be better for both compressors and turbines than the other loss coefficients investigated.

Numerical Analysis of the Impact of the Interior Nozzle Geometry on Low Mach Number Jet Acoustics

2016 ◽  
Vol 98 (2) ◽  
pp. 417-443 ◽  
Author(s):  
Mehmet Onur Cetin ◽  
Seong Ryong Koh ◽  
Matthias Meinke ◽  
Wolfgang Schröder
Keyword(s):  
Numerical Analysis ◽  
Mach Number ◽  
Nozzle Geometry ◽  
Low Mach Number ◽  
The Impact

scholarly journals Low Mach number fluctuating hydrodynamics for electrolytes

2016 ◽  
Vol 1 (7) ◽  
Author(s):  
Jean-Philippe Péraud ◽  
Andy Nonaka ◽  
Anuj Chaudhri ◽  
John B. Bell ◽  
Aleksandar Donev ◽  
...  
Keyword(s):  
Mach Number ◽  
Fluctuating Hydrodynamics ◽  
Low Mach Number

scholarly journals An interface capturing method for liquid-gas flows at low-Mach number

2021 ◽  
Vol 216 ◽  
pp. 104789
Author(s):  
Federico Dalla Barba ◽  
Nicoló Scapin ◽  
Andreas D. Demou ◽  
Marco E. Rosti ◽  
Francesco Picano ◽  
...  
Keyword(s):  
Mach Number ◽  
Gas Flows ◽  
Low Mach Number ◽  
Interface Capturing
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