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Thursday, August 6, 2020 | History

3 edition of Thermal effects in two-phase flow through face seals found in the catalog.

Thermal effects in two-phase flow through face seals

Thermal effects in two-phase flow through face seals

a dissertation submitted to the Graduate School in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Mechanical Engineering

  • 236 Want to read
  • 8 Currently reading

Published by Carnegie-Mellon University in Pittsburgh, Pa .
Written in English

    Subjects:
  • Two-phase flow.

  • Edition Notes

    Other titlesThermal effects in two phase flow through face seals.
    Statementby Prithwish Basu.
    SeriesNASA contractor report -- NASA CR-180962.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18068811M

    Heat Transfer and Flow Analysis in Loop Heat Pipe with Multiple Evaporators Using Network Model flow pattern. The calculation parameters were the total mass flow rate and enthalpy in the two-phase flow. About 20 nodes were used in their analysis and an implicit iteration technique was utilized to solve governing equations at each time step.   A replacement pump is required to provide flow for the new test seals. One continuing uncertainty in the test program is the lack of stationary test results due to unsteady flow conditions arising from a 2-phase mixture; i.e., the reaction forces could reasonably be expected to change continuously producing time varying measured dynamic.

    Flow of helium II, or of electrons in a superconductor, thought of as consisting of two interpenetrating, noninteracting fluids, a superfluid component which exhibits no resistance to flow and is responsible for superconducting properties, and a normal component, which behaves as does an ordinary fluid or as conduction electrons in a nonsuperconducting metal. The 15th International Topical Meeting on Nuclear Reactor Thermal - Hydraulics, NURETH NURETH Pisa, Italy, May , TWO-PHASE FLOW AND HEAT TRANSFER MODEL CALIBRATION AND CODE VALIDATION: A SUBCOOLED BOILING FLOW CASE STUDY A. Bui1, T.N. Dinh2, R.R. Nourgaliev1 and R.W. Youngblood1.

    This concise and heavily illustrated book is exclusively concerned with gas-liquid two-phase flows. The first part deals with adiabatic flows, that is flows without the addition or removal of heat. Topics include flow pattern maps and homogenous flow. The second part deals with heat-transfer in two-phase flows: boiling and condensation. It is concerned with issues like pressure drop flow.   This book is intended to be an introduction to the theory of thermo-fluid dynamics of two-phase flow for graduate students, scientists and practicing engineers seriously involved in the subject/5(6).


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Thermal effects in two-phase flow through face seals Download PDF EPUB FB2

Get this from a library. Thermal effects in two-phase flow through face seals: a dissertation submitted to the Graduate School in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Mechanical Engineering.

[Prithwish Basu; United States. National Aeronautics and Space Administration.]. For two-phase flow in microchannels, phenomenological models were developed primarily for the slug and annular flow patterns due to their dominance on the two-phase flow maps as well as their direct engineering relevance (Kreutzer et al., a, Gunther and Jensen,Angeli, and Gavriilidis, ).Cited by: 9.

Yasuna and Hughes () present an analysis for two-phase face seals including squeeze film effects and thermal transients. The model is based on the "discrete boiling" model referred earlier. Results for simulations to step perturbations of the film thickness are presented. A general theory is presented for the calculation of leakage rates and quasi-static opening force for aligned face seals operating in a turbulent, two-phase flow regime.

Here, the fluid is assumed to be a homogeneous mixture of liquid and vapor in thermodynamic by: 6. Thermal effects in two-phase flow through face seals [microform]: a dissertation submitted to the Graduate School in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Mechanical Engineering [].

Thermo-fluid Dynamics of Two-Phase Flow, Second Edition is focused on the fundamental physics of two-phase flow. The authors present the detailed theoretical foundation of multi-phase flow thermo-fluid dynamics as they apply to: Nuclear reactor transient and accident analysis; Energy systems; Power generation systems; Chemical reactors and process systems; Space propulsion; Transport by:   The present work discusses the characteristics of the thermal effects at microscale.

The thermal effects are divided into two types, steady and unsteady. The unsteady thermal effect focuses on the thermal response of object during heating. It relies on the object thermal inertia.

Thermal response phenomena have seldom application of practical Author: Zeng-Yuan Guo, Xin-Gang Liang. Phase Change and Choked Flow Effects on Rotordynamic Coefficients of Cryogenic Annular Seals Article in Journal of Tribology (4) October with 25 Reads How we measure 'reads'.

The fluid, structural and thermal results show that large-diameter (about 24 inch) face seals with small coning or out-of-plane deformations (of the order of inch) are possible.

Read the latest articles of Experimental Thermal and Fluid Science atElsevier’s leading platform of peer-reviewed scholarly literature Two-phase flow and boiling: Insights and understanding through modern noninvasive measuring techniques. select article Loss measurements and interpretation of Pitot pressures in two.

Thermo-Fluid Dynamics of Two-Phase Flow, Second Edition is a must have reference for graduate students, scientists and engineers who need in-depth theoretical foundations to solve two-phase flow problems in various technological systems.

Harrison and Watkins reported similar results for two-phase mechanical face seals with grooved faces. Laser surface texturing (LST) has the advantages of reducing friction and increasing load capability compared with those of flat surfaces, and has been successfully applied to all-liquid and all-gas mechanical face seals [14].Cited by: In fluid mechanics, two-phase flow is a flow of gas and liquid — a particular example of multiphase -phase flow can occur in various forms, such as flows transitioning from pure liquid to vapor as a result of external heating, separated flows, and dispersed two-phase flows where one phase is present in the form of particles, droplets, or bubbles in a continuous carrier phase (i.e.

Seal Face Materials In most mechanical seals, one face is made of a soft material while the other is made of a hard material. The soft face is usually carbon-graphite. This is usually impregnated with a resin or a metal (e.g., antimony) to reduce porosity. A wide variety of materials are used for the hard face.

The most popularFile Size: 2MB. Two-Phase Flow Experiment. The Two Phase Flow Experiment is a thermal control experiment that flew as a Hitchhiker payload on the Space Shuttle.

The primary objectives of the experiment were to demonstrate and characterize flight operation of a two-phase thermal control system with advanced features and components and to demonstrate capillary pumped loop (CPL) reliability in microgravity.

/ The effects of thermal non-equilibrium and inlet temperature on two-phase flow pressure drop type instabilities in an upflow boiling system. In: International Journal of Thermal Sciences. ; Vol. 39, No. Cited by: Thermo-fluid dynamic theory of two-phase flow on *FREE* shipping on qualifying offers.

Thermo-fluid dynamic theory of two-phase flowManufacturer: Eyrolles. Two-Phase Flow: Theory and Applications - CRC Press Book This graduate text provides a unified treatment of the fundamental principles of two-phase flow and shows how to apply the principles to a variety of homogeneous mixture as well as separated liquid-liquid, gas-solid, liquid-solid, and gas-liquid flow problems, which may be steady or.

the flow and thermal characteristics of two-phase flow through pipes with smaller inclinations. Introduction of small inclination creates the component of gravitational force which is exactly perpendicular to the flow in horizontal case. The normal component provides segregation of.

TRACER RESPONSES IN GAS-LIQUID, TWO-PHASE FLOW THROUGH POROUS MEDIA D. Haga1, Y. Niibori2, and T. Chida1 1Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University, Sendai, Japan 2Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan Key Words: Two-phase flow, Bubble flow, Cited by: 5.

Chapter Two-Phase Flow and Heat Transfer Compared with the homogeneous model, the separated flow model has been used more widely because it provides a better prediction of flow behavior with a manageable level of complexity.

The separated flow model assumes each phase to have different properties and to flow at different velocities.Numerical Computation of Two-Phase Flow in Porous Media.

D. Droste 1, F. Lindner,Ch. Mundt1 and M. Pfitzner1. 1Universität der Bundeswehr, Munich, Bavaria, Germany. Abstract: In this study we investigate the heat and mass transfer in a porous media with .The more important design parameters for two-phase flow systems include the following: Pressure drop Pressure losses occur in two-phase flow systems due to friction, acceleration and gravitational effects.

If a fixed flow is required, then the pressure drop determines the power input of the pumping system.