Last edited by Brat
Friday, July 17, 2020 | History

2 edition of Two-phase choked flow of converging-diverging nozzles found in the catalog.

Two-phase choked flow of converging-diverging nozzles

Robert J. Simoneau

Two-phase choked flow of converging-diverging nozzles

by Robert J. Simoneau

  • 207 Want to read
  • 28 Currently reading

Published by U.S. National Aeronautics and Space Administration, Lewis Research Center, for sale by the National Technical Information Service] in Washington, [Springfield, Va .
Written in English

    Subjects:
  • Two-phase flow -- Measurement.,
  • Low temperature engineering.,
  • Low temperature research.

  • Edition Notes

    StatementRobert J. Simoneau and Robert C. Hendricks.
    SeriesNASA technical paper -- 1484.
    ContributionsHendricks, Robert C., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., Lewis Research Center.
    The Physical Object
    Pagination80 :
    Number of Pages80
    ID Numbers
    Open LibraryOL15252020M

    Compressible flow (or gas dynamics) is the branch of fluid mechanics that deals with flows having significant changes in fluid all flows are compressible, flows are usually treated as being incompressible when the Mach number (the ratio of the speed of the flow to the speed of sound) is less than (since the density change due to velocity is about 5% in that case). The problem of a critical flow of two-phase mixture, boosted to a selected stagnation state and allowed to flow through a nozzle orifice into a long straight tube, is treated generically and analytically, making use of the basic laws of fluid mechanics and thermodynamics. Specific calculations have.

    Methods for The valve mass flux Gv is the calculated value for an valve sizing for single-phase (gas or liquid) flows areideal (isentropic) nozzle Gn from an appropriate model, well established, and are based upon simple single-multiplied by a discharge coefficient Kd, which accounts phase isentropic flow models, together with dischargefor. Shareable Link. Use the link below to share a full-text version of this article with your friends and colleagues. Learn more.

    For the condition of two-phase flow, the value must be modified, as explained in the Two-Phase Flow Theory Web Page. R' is the universal gas constant (R' = N-m/kmol-K) M is the effective molecular weight of the exhaust products, obtained from the combustion analysis, and must take into account the presence of all condensed-phase species. Flow O 0 0 0 oyO o0 0 (00 oO 0 0 - Bubble Radius, R(xJ) -I Fig. 1 Notation for bubbly liquid flow in a converging-diverging nozzle This profile will produce a simple sinusoidal pressure distri- bution in the case of incompressible flow with the minimum pressure coefficient, CPMIN, located at the nozzle throat, x = Ll2.


Share this book
You might also like
Power sharing in the panchayats of Orissa

Power sharing in the panchayats of Orissa

dictionary of the Cree language

dictionary of the Cree language

ordinance of the Lords and Commons assembled in Parliament, for the raising of monies to be imployed towards the maintenance of forces within this kingdom, under the command of Sir Thomas Fairfax Kt. And for the speedy transporting of and paying the forces for the carrying on the warre of Ireland. Die Mercurii 23 Junii. 1647.

ordinance of the Lords and Commons assembled in Parliament, for the raising of monies to be imployed towards the maintenance of forces within this kingdom, under the command of Sir Thomas Fairfax Kt. And for the speedy transporting of and paying the forces for the carrying on the warre of Ireland. Die Mercurii 23 Junii. 1647.

Netherlands between past and future.

Netherlands between past and future.

Fairbanks gold

Fairbanks gold

Dying to Win (Who Killed Peggy Sue, No. 1)

Dying to Win (Who Killed Peggy Sue, No. 1)

Arms control and the atomic bomb

Arms control and the atomic bomb

Problem solving

Problem solving

The Aztec Period Occupation of the Valley

The Aztec Period Occupation of the Valley

East Midlands Division Spondon H power station

East Midlands Division Spondon H power station

fossil rhinoceros (Diceratherium armatum Marsh)

fossil rhinoceros (Diceratherium armatum Marsh)

Physical Training Program Guidelines for U.S. Navy Recruits

Physical Training Program Guidelines for U.S. Navy Recruits

Passing strange

Passing strange

Subcommittee Hearings on H.R. 1181, To Amend Section 207 of the Legislative Reorganization Act of 1946 so as To Authorize Payment of Claims Arising from the Correction of Military or Naval Records

Subcommittee Hearings on H.R. 1181, To Amend Section 207 of the Legislative Reorganization Act of 1946 so as To Authorize Payment of Claims Arising from the Correction of Military or Naval Records

Information on authorities.

Information on authorities.

Drawing to an inside straight

Drawing to an inside straight

Two-phase choked flow of converging-diverging nozzles by Robert J. Simoneau Download PDF EPUB FB2

Two-phase choked flow of converging-diverging nozzles. Washington: U.S. National Aeronautics and Space Administration, Lewis Research Center ; [Springfield, Va.: for sale by the National Technical Information Service], Data are presented for the two-phase choked flow of three cryogenic fluids - nitrogen, methane, and hydrogen - in four converging-diverging nozzles.

were reported earlier. phase, from well below to well above the thermodynamic critical conditions. all cases the nozzle throat conditions were two phase. geometry. Several research studies on two-phase flow through converging–diverging nozzles were made for various applications.

The data on choked flow of subcooled oxygen for the first time and those of nitrogen were published for the first time by Hendricks et al. ().Cited by: Page 1 Shock Waves in Supersonic Two-Phase Flow of CO 2 in Converging-Diverging Nozzles Masafumi NAKAGAWA1, Menandro Serrano BERANA1, 2, *, Atsushi HARADA1 1Toyohashi University of Technology, Department of Mechanical and Structural System Engineering, Toyohashi City, Aichi, Japan; Tel.: +81 (53)Fax: +81 (53)Two-phase choked flow of converging-diverging nozzles book.

Converging-diverging nozzles with divergence angles of °, °, ° and ° were tested in a blowdown device during our previous study on. Report that "describes an investigation of the flow characteristics in a horizontal, converging-diverging nozzle for a two-phase, two-component system" (p.

1) using air and water and "attempting to determine the effects of accelerating the Cited by: 7. Fluid dynamics of cavitating sonic two-phase flow in a converging-diverging nozzle.

Experimental data were taken with four instrumented converging-diverging nozzles of various geometries using a custom testing rig that allowed for precise control and measurement of flow parameters such as mass flow, temperature, and pressure.

CALCULATIONS OF FLOW CHARACTERISTICS FOR TWO-PHASE FLOW IN ANNULAR CONVERGING-DIVERGING NOZZLES [D W Netzer] on *FREE* shipping on qualifying offers. Choked flow is a compressible flow effect. The parameter that becomes "choked" or "limited" is the fluid velocity. Choked flow is a fluid dynamic condition associated with the venturi a flowing fluid at a given pressure and temperature passes through a constriction (such as the throat of a convergent-divergent nozzle or a valve in a pipe) into a lower pressure environment C d {\displaystyle C_{d}}: discharge.

Nozzles for subsonic flight are simple converging nozzles, whereas converging– diverging nozzles are required for supersonic flight. Two generic nozzles are shown in Figureboth having the same critical area A 6, so that both would pass the same mass flow for given p t,5 and T t,5 and the same gas properties.

Obviously, if afterburning is used, the minimum section. A Laval nozzle is a convergent-divergent nozzle, invented by Gustav Patrik de Laval in for steam engine applications to produce a supersonic flow in the divergent section, directly following the choked and sonic flow conditions at the narrowest point of the nozzle.

In general, for flow through nozzles, hydrodynamic boundary layer is developed. The effect of boundary layer on choked flow in a convergent nozzle.

The model has been validated against the literature data for two-phase supersonic nozzles and overall ejector performance data. The results show that due to nonequilibrium effects and delayed phase change, the flow can choke well downstream of the minimum-area by: and the velocities are produced by accelerating the liquids in two-phase nozzles.

A two-phase nozzle is a nozzle in which a liquid and a gas are mixed at high pressure and low velocity and expanded to low pressure and high velocity.

The gas phase may either be the vapor of the liquid being accel-erated, in which case the flow is termed "one File Size: 2MB. This paper presents the experimental results the choked flow characteristics of a subcritical refrigerant through a converging-diverging nozzle.

A test nozzle with a throat diameter of 2 mm was designed and developed. The influence of operating conditions on the choked flow characteristics, i.e., the pressure profile and mass flow rate under choked flow conditions are Cited by: 4.

Converging-diverging nozzles with divergence angles of °, °, ° and ° were tested in a blowdown device during our previous study on supersonic two-phase flow of CO 2.

These nozzles were considered in the design of the ejector for a CO 2 vapor compression refrigeration system. File Size: 1MB. In an ejector, the pressure of the motive fluid is converted into momentum through a choked converging-diverging nozzle, which then entrains and raises the energy of a lower-momentum suction flow.

In a two-phase ejector, the motive nozzle flow is complicated by non-equilibrium phase change affecting local sonic velocity and leading to various Author: Miad Yazdani, Thomas D. Radcliff, Abbas A.

Alahyari, Mohsen Farzad. Abstract. The work reported here is part of a series of experiments [1–5] conducted in recent years at the NASA Lewis Research Center involving two-phase choked flow of liquid essential characteristics of these experiments were that the initial stagnation conditions were always single-phase and subcooled and that the pressure drop in the flow Cited by: 2.

Converging -diverging nozzles with divergence angles of °, °, ° and ° were tested in a blow down device during our previous study on supersonic two -phase flow of depend ence of efficiency and optimum divergence angle to File Size: KB.

Nozzle is defined as a device intended to control the speed and direction, or alteration of a liquid stream (particularly to expand speed) as it exits (or enters) an encased chamber or pipe. The convergent nozzle is a spout that begins large and gets.

As you increase your fluid velocity (when accelerate through a converging-diverging nozzle), Q2 rapidly increases while P2 rapidly decreases to balance the equation.

Eventually, you will reach a point in which the fluid is moving so quickly that the static pressure at the throat becomes lower than the vapor pressure (i.e. P2.The geometry of converging-diverging nozzles affects the conditions at which critical-subcritical flow transition occurs.

The objective of this work is to develop guidelines to identify the optimum nozzle geometry that maximizes critical pressure ratio while minimizing pressure drop across the nozzle. Experiments were conducted in a facility with in. ID PVC pipelines and a 30 ft. long Cited by: 1.A brief study was also conducted to study the flow characteristics of an air-water mixture in a converging-diverging nozzle.

Supersonic flow was obtained and shock waves were observed downstream of the throat. Measured throat pressures for choked flow were somewhat higher than those calculated from homogeneous mixture theory. iii.