Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Evan T. Hurlburt"'
Autor:
Kristofer Dressler, Arganthaël Berson, Gregory F. Nellis, Jason Chan, Evan T. Hurlburt, Brian Fehring, Roman Morse
A thermoreflectance method to measure wall temperature in two-phase annular flow is described. In high heat flux conditions, momentary dry-out occurs as the liquid film vaporizes, resulting in dramatic decreases in heat transfer coefficient. Simultan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f33a2c071faddf8e7c78b6ea95208480
https://doi.org/10.1115/1.0005429v
https://doi.org/10.1115/1.0005429v
Autor:
Tiago Augusto Moreira, Arganthaël Berson, Kristofer Dressler, Jason Chan, Louise McCarroll, Evan T. Hurlburt, Roman Morse, Gherhardt Ribatski, Gregory F. Nellis
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The entire liquid-film dryout process in a vertical two-phase annular flow is characterized experimentally, from inception to completion. Experiments are conducted using saturated R245fa at high vapor qualities in a heated rectangular channel with a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfd84378e7fb5842e071d5ca9b3be30b
Autor:
Kristofer Dressler, Arganthaël Berson, Brian Fehring, Evan T. Hurlburt, Jason Chan, Roman Morse, Gregory F. Nellis
Publikováno v:
Journal of Heat Transfer. 142
Instantaneous temperature measurements at the interface between a solid wall and a thin, unsteady liquid film are performed using thermoreflectance, a nonintrusive optical technique with high temporal resolution. A laser beam is directed at a wall–
Autor:
Evan T. Hurlburt, Thomas J. Hanratty
Publikováno v:
International Journal of Multiphase Flow. 28:707-729
Theoretical relations that can be used to predict transition from a stratified pattern to an intermittent pattern for gas–liquid flow in long pipes are presented. These include Kelvin–Helmholtz theory, viscous long wavelength theory, the necessar
Publikováno v:
International Journal of Multiphase Flow. 26:977-998
This paper examines the effect of small downward inclinations on the formation of slugs. Experiments were conducted with air and water at atmospheric pressure, in a pipe with a diameter of 0.0763 m, a length of 23 m and inclinations of −0.2, −0.5
Autor:
Ty A. Newell, Evan T. Hurlburt
Publikováno v:
Journal of Fluids Engineering. 122:396-402
This paper develops a liquid film symmetry correlation and a liquid film thickness distribution model for horizontal annular gas-liquid pipe flows. The symmetry correlation builds on the work of Williams et al. (1996) (Droplet Flux Distributions and
Autor:
Ty A. Newell, Evan T. Hurlburt
Publikováno v:
HVAC&R Research. 5:229-248
Results are presented for void fraction, pressure drop, and condensation heat transfer for refrigerants R-11, R-12, R-22, and R-134a over a range of mass fluxes, qualities, and tube sizes. General characteristics and trends in void fraction, pressure
Autor:
Evan T. Hurlburt, Ty A. Newell
Publikováno v:
Experiments in Fluids. 21:357-362
Two optical techniques are described for measurement of a liquid film's surface. Both techniques make use of the total internal reflection which occurs at a liquid-vapor interface due to the refractive index difference between a liquid and a vapor. T
Publikováno v:
Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer.
In nucleate boiling as the heat flux from the wall to the fluid is increased the heat transfer coefficient initially increases. At a sufficiently high heat flux called the critical heat flux (CHF) the heat transfer mechanism suddenly becomes less eff
Publikováno v:
Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer.
A fundamental departure from nucleate boiling (DNB) flow visualization experiment was designed to obtain a better understanding of flow boiling by visually capturing the mechanisms leading up to and including DNB for subcooled vertical flow boiling.