Investigation of two and Three Parameter Equations of State for Cryogenic Fluids

  • Susan L. Jenkins
  • Alok K. Majumdar
  • Robert C. Hendricks
Chapter
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 35)

Abstract

Two-phase flows are a common occurrence in cryogenic engines and an accurate evaluation of the heat-transfer coefficient in two phase flow is of significant importance in their analysis and design. The thermodynamic equation of state plays a key role in calculating the heat transfer coefficient which is a function of thermodynamic and thermophysical properties. An investigation has been performed to study the performance of two- and three-parameter equations of state to calculate the compressibility factor of cryogenic fluids along the saturation loci. The two-parameter equations considered here are van der Waals and Redlich-Kwong equations of state. The three-parameter equation represented here is the generalized Benedict-Webb-Rubin (BWR) equation of Lee and Kesler. Results have been compared with the modified BWR equation of Bender and the extended BWR equations of Stewart. Seven cryogenic fluids have been tested: oxygen, hydrogen, helium, nitrogen, argon, neon, and air. The performance of the generalized BWR equation is poor for hydrogen and helium. The van der Waals equation is found to be inaccurate for air near the critical point. For helium, all three equations of state become inaccurate near the critical point.

Keywords

Methane Dioxide Argon Helium Hydrocarbon 

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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Susan L. Jenkins
    • 1
  • Alok K. Majumdar
    • 2
  • Robert C. Hendricks
    • 3
  1. 1.Lockheed Missiles & Space Co., Inc.HuntsvilleUSA
  2. 2.Sverdrup Technology, Inc.HuntsvilleUSA
  3. 3.NASA Lewis Research CenterClevelandUSA

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