scholarly journals Adiabatic Compression Testing—Part I: Historical Development and Evaluation of Fluid Dynamic Processes Including Shock-Wave Considerations

2010 ◽  
pp. 337-337-25
Author(s):  
Barry E. Newton ◽  
Ted Steinberg
Keyword(s):  
Shock Wave ◽  
Historical Development ◽  
Fluid Dynamic ◽  
Adiabatic Compression ◽  
Compression Testing ◽  
Dynamic Processes

On Difference Methods for Shock Wave Propagation in Variable Area Ducts Including Wall Friction

1973 ◽  
Vol 95 (2) ◽  
pp. 327-332
Author(s):  
R. H. Fashbaugh ◽  
A. Widawsky
Keyword(s):  
Shock Wave ◽  
Wave Attenuation ◽  
Fluid Dynamic ◽  
Finite Difference Methods ◽  
Wall Friction ◽  
Variable Cross ◽  
Viscous Effects ◽  
Cross Sectional ◽  
Basic Fluid ◽  
Difference Methods

Results are presented of an analytical study concerned with the prediction of the propagation of shock waves through air ducting systems. The solution is one-dimensional but is appropriate for ducts which have a variable cross-sectional area and includes attenuation due to viscous effects at the wall of the duct. Finite-difference methods are utilized to obtain an approximate solution to the basic fluid dynamic equations. Comparisons are given between analytical results and shock tube experimental data which validate the capabilities of the methods used to predict shock wave attenuation and the effect of duct area variation on shock strength.

Modelling of the fluid dynamic processes in a high-recirculation airlift reactor

2001 ◽  
Vol 25 (6) ◽  
pp. 487-500 ◽  
Author(s):  
David A. Sanders ◽  
Howard Cawte ◽  
Adam D. Hudson
Keyword(s):  
Fluid Dynamic ◽  
Airlift Reactor ◽  
Dynamic Processes

scholarly journals Design Methodology for Supersonic Radial Vanes Operating in Nonideal Flow Conditions

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Nitish Anand ◽  
Salvatore Vitale ◽  
Matteo Pini ◽  
Gustavo J. Otero ◽  
Rene Pecnik
Keyword(s):  
Shock Wave ◽  
Fluid Dynamic ◽  
Dynamic Performance ◽  
Computational Cost ◽  
Organic Rankine Cycle ◽  
Suction Side ◽  
Rankine Cycle ◽  
Computational Effort ◽  
Design Guidelines ◽  
Boundary Layer Interaction

The stator vanes of high-temperature organic Rankine cycle (ORC) radial-inflow turbines (RIT) operate under severe expansion ratios and the associated fluid-dynamic losses account for nearly two-thirds of the total losses generated within the blading passages. The efficiency of the machine can strongly benefit from specialized high-fidelity design methods able to provide shapes attenuating shock wave formation, consequently reducing entropy generation across the shock-wave and mitigating shock-wave boundary layer interaction. Shape optimization is certainly a viable option to deal with supersonic ORC stator design, but it is computationally expensive. In this work, a robust method to approach the problem at reduced computational cost is documented. The method consists of a procedure encompassing the method of characteristics (MoC), extended to nonideal fluid flow, for profiling the diverging part of the nozzle. The subsonic section and semibladed suction side are retrieved using a simple conformal geometrical transformation. The method is applied to design a supersonic ORC stator working with Toluene vapor, for which two blade shapes were already available. The comparison of fluid-dynamic performance clearly indicates that the MoC-Based method is able to provide the best results with the lowest computational effort, and is therefore suitable to be used in a systematic manner for drawing general design guidelines.

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