对旋转式动力机械的分析.ppt

Introduction to Rotating Machinery Analysis Using Fluent
Frank Kelecy
Fluent Inc.
Agenda
Introduction
Single moving reference frame (SRF) model
Multiple moving reference frame (MRF) model
Mixing plane model
Sliding mesh model
Questions?
Motivation
Flows involving rotating domains occur frequently in engineering
pressors and turbines
fans and pumps
rotating cavities, seals, and bearings
mixing equipment
fluid coupling devices and torque converters
air motors
marine and aircraft propellers
and many more…
Computational Fluid Dynamics (CFD) today plays a central role in the design and analysis of rotating machinery
Examples of Rotating Machinery
gas turbine engine
automotive water pump
tube axial fan
steam turbine
HVAC blower unit
hydro turbine
Goals of the Training
Provide an introduction to rotating machinery modeling
Examine the four major classes of rotating machinery problems
Single rotating reference frame (SRF)
Multiple rotating reference frame (MRF)
Mixing plane
Sliding mesh
Present details on modeling rotating machinery problems using Fluent
Model setup
Solution process (steady-state and unsteady)
Answer your questions!
Types of Rotating Machinery
In this course, we will classify rotating machinery as follows:
Turbomachinery - machines which add work to or extract work from a pressors, fans, pumps - add work to achieve a pressure rise in the fluid
turbines, windmills - extract work from fluid to drive other machines
Mixing equipment - machines which are designed to mix fluid (and possibly solid) materials for use in a chemical processing application
industrial mixing tanks
Rotating tanks, seals, cavities, and other devices
disk cavities and labyrinth seals in gas turbine engines
electric motor cooling passages
disk drives
rotating tires on automotive vehicles
All of these applications involve rotating surfaces and domains (and thus may use a rotating reference frame for modeling)
Classification of Turbomachinery
Axial machines
Flow through