The Practical Application of CFD in the Design of Industrial Centrifugal Compressors

2000 ◽  
Author(s):  
James M. Sorokes ◽  
Bradley R. Hutchinson
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Gas Turbine ◽  
Flow Fields ◽  
Practical Application ◽  
Jet Engine ◽  
Flow Problems ◽  
Computational Fluid Dynamics Cfd ◽  
Complex Fluid

Abstract In the development of industrial turbomachinery, the aerodynamic designer is faced with many complex fluid flow problems. In the mid to late 1980’s, Computational Fluid Dynamics (CFD) software was developed to assist in the solution of these flow fields. Initially applied only by high end gas turbine or jet engine designers, these sophisticated tools eventually found their way to engineers at industrial turbomachinery manufacturers. However, it has only been in the last five to ten years that industrial users have begun to make more widespread use of CFD. There are a variety of reasons for this slow adoption.

Elements of a Graduate Course in Computational Fluid Dynamics: Successful Assimilation and Implementation

2013 ◽  
Author(s):  
Subha Kumpaty
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Course Evaluation ◽  
Successful Implementation ◽  
Positive Experience ◽  
Graduate Course ◽  
Flow Problems ◽  
Computational Fluid Dynamics Cfd ◽  
Positive Experiences ◽  
Fluid Dynamics Equations

While a course in Computational Fluid Dynamics (CFD) is a common offering in many universities and for several decades, the author of this paper learnt interesting patterns from the students’ assimilation of the principles and implemented the pedagogical build-up for positive experiences during the recent offering in winter 2012–13. With precise assignments that highlight the appropriate concepts to be learnt and put to coding, the students have progressed in gaining the confidence to tackle a variety of flow problems. Students felt that they could always learn using software and solve problems but the intricate details in understanding and applying the governing fluid dynamics equations was what they were able to gain from the course. The topical treatment given, the problems solved, the techniques applied, the software used are presented in this paper as an example of successful implementation of and enhanced student learning in a graduate course in CFD. Industry-relevant course projects culminated the positive experience, as confirmed by the course evaluation results.

Numerical Simulations of the Non-Newtonian Blood Blow in Human Abdominal Artery Based on Reverse Engineering

2011 ◽  
Vol 140 ◽  
pp. 195-199 ◽  
Author(s):  
Jin You YANG ◽  
Yang Hong
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Blood Flow ◽  
Fluid Flow ◽  
Reverse Engineering ◽  
Power Law ◽  
Cardiac Cycle ◽  
Hemodynamic Parameters ◽  
Human Artery ◽  
Computational Fluid Dynamics Cfd

The method that combined the reverse engineering based on CT medical images and computational fluid dynamics (CFD) was used to perform simulation the Non-Newtonian blood fluid flow in human abdominal artery, then analyzed the hemodynamic condition about the bifurcation of human abdominal artery. A Non-Newtonian blood model (the Generalised Power Law) was used to study the hemodynamic parameters during entire cardiac cycle. Calculated results for the Non-Newtonian blood flow show us the methods performed in this study is suitable for numerical simulating the blood flow in human artery and investigating the relation between hemodynamic factors and vascular disease.

Prometheus: A Geometry-Centric Optimization System for Combustor Design

2014 ◽  
Author(s):  
Xu Zhang ◽  
David J. J. Toal ◽  
Neil W. Bressloff ◽  
Andy J. Keane ◽  
Frederic Witham ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Gas Turbine ◽  
Computer Aided Design ◽  
Design System ◽  
Gas Turbine Combustor ◽  
Computer Aided ◽  
Computational Fluid Dynamics Cfd ◽  
Automatic Mesh ◽  
Aided Design

The following paper presents an overview of the Prometheus design system and its applications to gas turbine combustor design. Unlike a traditional “optimizer-centric” method, Prometheus aims to reduce both the level of workflow complexity and rework by taking a more “geometry-centric” approach to design optimization by shifting the control of script generation away from the optimization program to the computer aided design (CAD) package. Prometheus therefore enables significant geometry changes to be automatically reflected in all subsequent scripts necessary for the analysis of a combustor. Prometheus’ current capabilities include automatic fluid volume generation and aero-thermal and thermo-acoustic network generation as well as automatic mesh and computational fluid dynamics (CFD) script generation.

COMBUSTION AND NOX FORMATION MODELING USING EDDY RESOLVING TURBULENCE MODELS

2020 ◽  
Author(s):  
A. M. Sipatov ◽  
◽  
A. V. Khokhlov ◽  
T. V. Abramchuk ◽  
R. A. Zagitov ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Methods ◽  
Gas Turbine ◽  
Turbulence Models ◽  
Gas Turbine Combustor ◽  
Nox Formation ◽  
Engine Design ◽  
Computational Fluid Dynamics Cfd ◽  
Physical Phenomena

The study of processes occurring in gas turbine combustor is an important part of engine design for achieving the required technical, operational, and environmental characteristics of the engine. During engine design process, both experimental and computational methods are used. The progress in numerical methods of modeling fourdimensional (space and time) physical phenomena and increasing of computation capacity allow application of complex computational fluid dynamics (CFD) methods for simulating such technical devices as the gas turbine combustor.

The Application of Computational Fluid Dynamics to Railway Aerodynamics

1993 ◽  
Vol 207 (2) ◽  
pp. 133-141 ◽  
Author(s):  
A P Gaylard
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Speed ◽  
Cross Flow ◽  
Practical Application ◽  
High Speed Rail ◽  
Promising Strategy ◽  
Temperature Environment ◽  
Computational Work ◽  
Computational Fluid Dynamics Cfd

The growing application of computational fluid dynamics (CFD) to railway aerodynamics is described. After cautioning against overselling the capabilities of CFD codes, a review is presented of the more significant computational work undertaken in this field. Three recent applications of CFD are examined: (a) a high-speed rail vehicle in a cross-wind; (b) cross-flow impingement on a freight vehicle in the Channel Tunnel; (c) the temperature environment in a stationary passenger train. Comparative experimental data are offered for each of the above. An analysis of these applications is used to derive a promising strategy for the practical application of CFD.

scholarly journals Computational Fluid Dynamics Study of Swimmer's Hand Velocity, Orientation, and Shape: Contributions to Hydrodynamics

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Milda Bilinauskaite ◽  
Vishveshwar Rajendra Mantha ◽  
Abel Ilah Rouboa ◽  
Pranas Ziliukas ◽  
Antonio Jose Silva
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Steady State ◽  
Drag Force ◽  
3D Models ◽  
Hydrodynamic Characteristics ◽  
Front Crawl ◽  
Drag Forces ◽  
Computational Fluid Dynamics Cfd

The aim of this paper is to determine the hydrodynamic characteristics of swimmer’s scanned hand models for various combinations of both the angle of attack and the sweepback angle and shape and velocity of swimmer's hand, simulating separate underwater arm stroke phases of freestyle (front crawl) swimming. Four realistic 3D models of swimmer's hand corresponding to different combinations of separated/closed fingers positions were used to simulate different underwater front crawl phases. The fluid flow was simulated using FLUENT (ANSYS, PA, USA). Drag force and drag coefficient were calculated using (computational fluid dynamics) CFD in steady state. Results showed that the drag force and coefficient varied at the different flow velocities on all shapes of the hand and variation was observed for different hand positions corresponding to different stroke phases. The models of the hand with thumb adducted and abducted generated the highest drag forces and drag coefficients. The current study suggests that the realistic variation of both the orientation angles influenced higher values of drag, lift, and resultant coefficients and forces. To augment resultant force, which affects swimmer's propulsion, the swimmer should concentrate in effectively optimising achievable hand areas during crucial propulsive phases.

Introducing CFD to Undergraduate Chemical Engineers

1998 ◽  
Vol 26 (2) ◽  
pp. 126-132 ◽  
Author(s):  
Derek Wilkinson
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Chemical Engineering ◽  
Practical Experience ◽  
Short Introduction ◽  
Flow Problems ◽  
Simple Fluid ◽  
Initial Results

CFD (computational fluid dynamics) has become readily accessible and is widely applied in many aspects of the processing industries. A short introduction to CFD has been included in undergraduate Chemical Engineering courses with the aim of giving students an appreciation of its principal features. This comprised three lectures followed by practical experience of commercial CFD software applied to four simple fluid flow problems. A leading aim of the course has been to encourage a sceptical approach to initial results and to indicate methods by which their validity should be established.

Using Computational Fluid Dynamics (CFD) for Evaluation of Fluid Flow Through a Gate Valve

2012 ◽  
Vol 8 (4) ◽  
Author(s):  
Pedro Esteves Duarte Augusto ◽  
Marcelo Cristianini
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Pressure Drop ◽  
Gate Valve ◽  
Flow Behavior ◽  
Flow Characteristics ◽  
Type Equation ◽  
Pharmaceutical Products ◽  
Computational Fluid Dynamics Cfd

Abstract Gate valves are the most common valve in industrial plants. However, there is no work in the literature regarding the use of computational fluid dynamics (CFD) to evaluate the fluid flow characteristics and pressure drop in gate valves. The present work evaluated the fluid flow and pressure drop through a commercial gate valve using CFD. The obtained values for the pressure loss coefficient (k) are in accordance to those described in the literature and a power type equation could be used for modeling it as function of the Reynolds Number. Fluid flow behavior through the gate valve highlighted the flow recirculation and stagnant areas, being critical for food and pharmaceutical products processing. The obtained results reinforce the advantages in using CFD as a tool for the engineering evaluation of fluid processes.

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