Physics-Based Compressible Flow and Network Modeling for Design Applications

Physics-Based Compressible Flow and Network Modeling for Design Applications

April 13, 2019
University of Nevada, Las Vegas, NV, USA

Nonisentropic compressible flows are ubiquitous in many mechanical, chemical, and aerospace engineering applications, including gas turbines in their inlet systems, compressors, combustors, turbines, and exhaust systems. One-dimensional treatment of these flows forms the basis for most preliminary/conceptual designs. They are, however, generally counter-intuitive. For example, it defies common sense that the wall friction accelerates a subsonic compressible flow in a constant-area duct with or without heating. This workshop will provide a comprehensive review and reinforcement of the key concepts of one-dimensional compressible flows with simultaneous area change, friction, heat transfer, and rotation, which is seldom found in a textbook. In addition to the key concepts of thermofluids such as stream thrust, impulse pressure, rothalpy, mass flow functions, impulse functions, and normal shock function, this workshop will present an easy method to compute pressure and temperature changes in a generalized vortex in both rotor and stator reference frames. The workshop will conclude with a design-friendly overview of a compressible flow network featuring internal choking and normal shocks along with robust solution methods. A number of design-relevant examples will also be solved in the workshop. It behooves CFD engineers to use the unique foundation developed in this workshop as a prerequisite for all their 3-D CFD analyses, including physics-based interpretation of boundary conditions and computed results for design applications.


  • Will develop a unique intuitive understanding of isentropic and nonisentropic compressible flows, including the coupled effects of area change, friction, heat transfer, and rotation
  • Will develop a strong foundation in the physics-based thermofluids design of various engineered components
  • Will be more knowledgeable in developing physics-based compressible flow models and applying accurate boundary conditions
  • Will be more knowledgeable in correctly interpreting results of their compressible flow design analyses
  • Will develop skills to hand-calculate compressible flow results to perform sanity-checks of predictions by design tools as well as validate these tools during their development
  • Will improve participant's engineering productivity with reduced design cycle time


This workshop will be of interest to graduate students, research workers in universities and research institutes, and research and design engineers in industry who are involved in the physics-based thermofluids design and technology development of various components and systems, including high-performance gas turbine components such as inlet systems, compressors, combustors, turbines, diffusers, exhaust systems, internal air systems, and turbine airfoil internal and film cooling.


Workshop Outline

Module 1: Key Concepts of Thermofluids
Module 2: Compressible Flow Functions
Module 3: Isentropic Flows
Module 4: Flows with Gradual Changes in Entropy - Fanno and Rayleigh Flows
Module 5: Flows with Abrupt Changes in Entropy - Normal Shocks
Module 6: Pressure and Temperature Changes in a Generalized Vortex
Module 7: Compressible Flow Network Modeling
Module 8: Design Examples and Discussions


Registration will be limited to 30 participants.

Five complimentary, autographed copies of Fluid Mechanics: An Intermediate Approach (2015) will be distributed among workshop attendees using a random draw.