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Tuesday, May 5, 2020 | History

1 edition of Onset of Flow Instability and Critical Heat Flux in Horizontal, Thin, Uniformly-Heated Annuli found in the catalog.

Onset of Flow Instability and Critical Heat Flux in Horizontal, Thin, Uniformly-Heated Annuli

Onset of Flow Instability and Critical Heat Flux in Horizontal, Thin, Uniformly-Heated Annuli

  • 360 Want to read
  • 35 Currently reading

Published by Storming Media .
Written in English

    Subjects:
  • TEC003040

  • The Physical Object
    FormatSpiral-bound
    ID Numbers
    Open LibraryOL11848067M
    ISBN 101423536886
    ISBN 109781423536888

    Dou, H.-S., Physics of flow instability and turbulent transition in shear flows, International Journal of Physical Science, 6(6), March , (published). Physics of Flow Instability and Turbulent Transition in Shear Flows Hua-Shu Dou Temasek Laboratories, National University of Singapore, Singapore Cited by: Abstract. Here we report on MIT’s THM work in Q4 and Q1 The goal of this project is to design, construct and execute tests of flow boiling critical heat flux (CHF) at high-pressure using high-resolution and high-speed video and infrared (IR) thermometry, to generate unique data to inform the development of and validate mechanistic boiling heat transfer and CHF models.

      Experimental investigation into flow boiling critical heat flux (CHF) characteristics in narrow rectangular channels was performed under rotating state using distilled water as working fluids. The effects of mass velocity, inlet temperature and heating orientation on CHF under dynamic load were analyzed and discussed in this paper. The results show that the dynamic load obviously influences Cited by: 1.   Calculates the mass flow rate of a fluid through a pipe with constant surface heat flux. Made by faculty at the University of Colorado Boulder Department of .

    Abstract. A quantitative analysis of critical heat flux (CHF) under countercurrent flow limitation (CCFL) or flooding was successfully carried out using the existing experimental results for vertical circular, rectangular, and annual channels, applying the criteria, proposed by the author, that the CCFL condition could be determined by maximizing the water mass flux falling down in the. (). Critical Heat Flux for Uniformly Heated Rod Bundle under High-Pressure, Low-Flow and Mixed Inlet Conditions. Journal of Nuclear Science and Technology: Vol. 26, No. 5, pp. Cited by: 3.


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Onset of Flow Instability and Critical Heat Flux in Horizontal, Thin, Uniformly-Heated Annuli Download PDF EPUB FB2

The onset of flow instability (OFI) and critical heat flux (CHF) in heated thin horizontal annular flow passages cooled by subcooled water were investigated. For OFI, six different test sections, with inner diameter of mm, annular gap widths of – mm, and heated lengths Cited by: Onset of flow instability and critical heat flux in horizontal, thin, uniformly- heated annuli by Stoddard, Ryan M.

Onset of Flow Instability and Critical Heat Flux in Horizontal, Thin, Uniformly-Heated Annuli Article April with 7 Reads How we measure 'reads'. The onset of flow instability (OFI) and critical heat flux (CHF) in heated thin horizontal annular flow Uniformly-Heated Annuli book cooled by subcooled water were OFI, six different test sections.

Advanced Search. Onset of nucleate boiling and onset of flow instability in uniformly heated microchannels with subcooled water flow were experimentally investigated using cm long tubular test sections, mm and mm in diameter, with a cm long heated by: Onset of flow instability and critical heat flux in horizontal, thin, uniformly-heated annuliAuthor: Ryan Manse Stoddard.

The Onset of Flow Instability in Uniformly Heated Horizontal Microchannels Article in Journal of Heat Transfer (1) February with 51 Reads How we measure 'reads'. ONSET OF FLOW INSTABILITY AND CRITICAL HEAT FLUX IN HORIZONTAL, THIN, UNIFORMLY-HEATED ANNULI A THESIS Presented to The Academic Faculty by Ryan Manse Stoddard In Partial Fulfillment of the Requirements for the Degree Master of Science in Mechanical Engineering Georgia Institute of Technology April In fact, un-even flow and heat flux distributions may determine unstable conditions that eventually lead to flow starvation in some of the channels.

The paper is focused on the evaluation of correlations for the Onset of Flow Instability (OFI) in heated vertical narrow rectangular channels, at low by: Stoddard et al.

() studied the onset of flow instability and critical heat flux in thin horizontal annuli. For OFI, the authors used six different test sections, with inner diameter of  mm, annular gap widths of – mm, and heated lengths of –  by: 4.

Haas, Christoph, Meyer, Leonhard, and Schulenberg, Thomas. "Flow Instability and Critical Heat Flux for Flow Boiling of Water in a Vertical Annulus at Low Pressure." Proceedings of the ASME/JSME 8th Thermal Engineering Joint Conference. ASME/JSME 8th Thermal Engineering Joint Conference.

Honolulu, Hawaii, USA. March 13–17, TCited by: 2. Critical heat flux (CHF) experiments using deionized water as working fluid have been conducted in a range of pressure from to MPa, mass flow velocity from 60 to kg/m 2 s and wall heat flux from 10 to 90 kW/m 2 for vertical narrow annuli with annular gap sizes of and mm.

We found that the CHF, occurring only on the inside tube, or on the outside tube or on both tubes of the annular Cited by: Stoddard RM, Blasick AM, Ghiaasiaan SM, Abdel-Khalik SI, Jeter SM, Dowling MF () Onset of flow instability and critical heat flux in thin horizontal annuli.

Exp Therm Fluid Sci –14 Google ScholarAuthor: Sujoy Kumar Saha, Gian Piero Celata. A methodology to predict the onset of flow instability (OFI) in a single horizontal microtube with an inlet orifice is developed based on the predication of pressure drop.

The predictive methodology states, for the same flow rate, the flow instability occurs as the single-phase liquid pressure drop under no heating condition equals the two Cited by: 3. The Critical Heat Flux Condition With Water in a Uniformly Heated Microtube The critical heat flux (CHF) condition needs to be well understood for designing minia-ture devices involving two-phase flow.

Experiments were performed to determine the CHF condition for a single stainless steel tube having an inside diameter of mm sub-File Size: KB. R.M. Stoddard's 3 research works with 37 citations and reads, including: Onset of flow instability and critical heat flux in thin horizontal annuli.

Introduction. The design of plasma facing components such as divertor plates, that will be capable of withstanding heat flux of several tens of MW m −2, requires the development of high performance cooling components will be exposed to important heat loads only on the side that faces to plasma and will be actively cooled by pressurized subcooled flow of by: Critical Heat Flux (CHF), Viscous potential flow, Interfacial instability, Pool boiling 1.

INTRODUCTION Accurate prediction of critical heat flux(CHF) is very important in nuclear reactor design and safety analysis. Because a CHF can be the upper limit of efficient cooling condition and safety. A number of. Critical heat flux (CHF) describes the thermal limit of a phenomenon where a phase change occurs during heating (such as bubbles forming on a metal surface used to heat water), which suddenly decreases the efficiency of heat transfer, thus causing localised overheating of the heating surface.

The critical heat flux for ignition is the lowest thermal load per unit area capable of initiating a. In this study, a quantitative analysis of critical heat flux (CHF) in rectangular heated channels was carried out based on new flow models and the analytical results were compared with existing experimental results at pressures of about to 14 MPa with a water mass flux of to 28, kg/m 2 s and inlet water subcooling ranging from 0 to K.

The flow models proposed for CHF were a Cited by: 8. It was found that structured surfaces formed inside channel walls can assist mitigating the rapid bubble growth instability, which dominates many systems utilizing flow boiling in microchannels.

This, in turn, delayed the parallel channel instability and the critical heat flux (CHF) by: Onset of flow instability and critical heat flux in thin horizontal annuli RM Stoddard, AM Blasick, SM Ghiaasiaan, SI Abdel-Khalik, SM Jeter, Experimental Thermal and Fluid Science 26 (1).Stoddard RM, Blasick AM, Ghiaasiaan SM, Abdel-Khalik SI, Jeter SM, Dowling MF () Onset of flow instability and critical heat flux in thin horizontal annuli.

Exp .