Download or read book A Synthesis of Computations and Experiments for Obtaining Pulsatile Gas Flow Rates from Dynamic Pressure Difference Measurements Across an Orifice plate Meter written by Nikhil Ajotikar and published by . This book was released on 2011 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Orifice Meter and Gas Measurement written by Willis C. Brown and published by . This book was released on 1921 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessments and Computational Simulations in Support of a Time varying Mass Flow Rate Measurement Technique for Pulsatile Gas Flow written by Andrew F. Rice and published by . This book was released on 2012 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the Pressure Driven Flow of Gases Through Micro capillaries and Micro orifices written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large body of experimentally measured gas flow rates were obtained from the literature and then compared to the predictions obtained with constitutive flow equations. This was done to determine whether the equations apply to the predictions of gas flow rates from leaking containment vessels used to transport radioactive materials. The experiments consisted of measuring the volumetric pressure-driven flow of gases through micro-capillaries and micro-orifices. The experimental results were compared to the predictions obtained with the equations given in ANSI N14.5 the American National Standard for Radioactive Materials-Leakage Tests on Package for Shipment. The equations were applied to both (1) the data set according to the recommendations given in ANSI N14.5 and (2) globally to the complete data set. It was found that: The continuum and molecular flow equation provided good agreement between the experimental and calculated flow rates for flow rates less than about 1 atm·cm3/s. The choked flow equation resulted in over-prediction of the flow rates for flow rates less than about 1 atm-cm3/s. For flow rates higher than 1 atm·cm3/s, the molecular and continuum flow equation over-predicted the measured flow rates and the predictions obtained with the choked flow equation agreed well with the experimental values. Since the flow rates of interest for packages used to transport radioactive materials are almost always less than 1 atm·cm3/s, it is suggested that the continuum and molecular flow equation be used for gas flow rate predictions related to these applications.
Download or read book Fundamentals of Gas Particle Flow written by G Rudinger and published by Elsevier. This book was released on 2012-12-02 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Gas-Particle Flow is an edited, updated, and expanded version of a number of lectures presented on the “Gas-Solid Suspensions course organized by the von Karman Institute for Fluid Dynamics. Materials presented in this book are mostly analytical in nature, but some experimental techniques are included. The book focuses on relaxation processes, including the viscous drag of single particles, drag in gas-particles flow, gas-particle heat transfer, equilibrium, and frozen flow. It also discusses the dynamics of single particles, such as particles in an arbitrary flow, in a rotating gas, in a Prandtl-Meyer expansion, and in an oscillating flow. The remaining chapters of the book deal with the thermodynamics of gas-particle mixtures, steady flow through ducts, pressure waves, gas-particle jets, boundary layer, and momentum transfer. The experimental techniques included in this book present the powder feeders, the instrumentation on particle flow rate, velocity, concentration and temperature, and the measurement of the particle drag coefficient in a shock tube.
Download or read book Gas Tables for Compressible Flow Calculations written by S. M. Yahya and published by New Age International. This book was released on 2006 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of compressible flow or gas dynamics deals with the thermo-fluid dynamic problems of gases and vapours. It is now an important part of the undergraduate and postgraduate curricula. Fundamentals of Compressible Flow covers this subject in fourteen well organised chapters in a lucid style. A large mass of theoretical material and equations has been supported by a number of figures and graphical depictions. Author's sprawling teaching experience in this subject and allied areas is reflected in the clarity, and systematic and logical presentation.
Download or read book Physics Briefs written by and published by . This book was released on 1979 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1966 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas and Liquid Pulsations in Piping Systems Prediction and Control written by Institution of Mechanical Engineers (Great Britain). Fluid Machinery Committee and published by . This book was released on 1988 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas liquid Flows written by and published by . This book was released on 1995 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pressure Drop Across an Orifice in Pulsing Gas Flows written by Hall, S. S and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement and Computation of Streamflow written by Saul Edward Rantz and published by . This book was released on 1982 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Analytical experimental Approach to the Analysis of Pulsating Flow Through Orifices written by American Gas Association and published by . This book was released on 1955 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Flow in Fluidized Beds of Large Particles written by Goran N. Jovanovic and published by . This book was released on 1979 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas mixing is studied in fluidized beds of large particles. The bed is 0. 483 m by 0. 127 m (19 in. by 5 in.) in cross section and has transparent plexiglass panels on the front and back. A tube matrix made of twenty-seven 50.8 mm (2 in.) diameter plexiglass cylinders fixed in an equitriangular pitch (with the pitch to diameter ratio equal to 2) is used to study the effects of tubes. Experiments are done in a bed with and without tube array. Sand and dolomite particles with mean particle diameter of 1.3 mm (0. 051 in.) to 4.0 mm (0. 157 in.) are used. Gas velocities are varied from minimum fluidization velocity to an excess velocity of 2.5 m/s. Two large particle fluidization regimes are described. The experimental evidence is presented in support of the existence of slow bubble and exploding bubble regimes. A semi-theoretical equation establishing the boundary between these two modes of fluidization is derived. A slow bubble regime is encountered in the bed in which the interstitital velocity of the gas exceeds the rising velocity of bubbles. Here the gas uses the bubble as a convenient shortcut on its way through the bed. The exploding bubble regime is reached at higher superficial gas velocities when the bubble growth rate is of the same magnitude as the bubble rise velocity. Large pressure drop oscillations, gross gas bypassing, defluidization of some of the particles and rapid bubble growth are characteristics of the exploding bubble regime. A new criterion is suggested for distinguishing between the fast and the slow bubble regimes. The criterion is derived as a relationship between two non-dimensional groups. The expansion of the bed of large particles with and without tube array is also studied. Theoretical equations are proposed for correlating relative bed voidage versus relative excess gas velocity. They are based on the two-phase theory and all are developed as a special case of one general equation. The equation derived for the slow bubble regime fits the experimental data of this study better than other existing correlations. The equation developed for the fast bubble regime compares favorably with literature data for fine particles. A special case of the general equation can be developed for stationary bubbles and for the slugging regime. It is found that there is little difference in expansion of beds with and without a tube array at low excess gas velocities. However, for higher excess gas velocities expansion is considerably greater for beds with a tube array. Exploding bubbles in a bed without tubes are responsible for this difference. The dispersion of tracer gas injected continuously through a line source above the distributor plate is determined for time-averaged concentration measurements. The tracer concentration at points within the bed is successfully predicted using a single-phase model with interstitial gas velocity (based on average bed voidage) as a characteristic fluidization velocity. The model is insensitive to axial dispersion and depends only on radial dispersion coefficients. The radial dispersion coefficient does not depend on either horizontal or vertical position in the bed and is a strong function of excess gas velocity. Considerable difference is found in tracer dispersion in beds with and without tube array. A new model, called the meandering flow model, is proposed for gas flow through fluidized beds of large particles. The concept of meandering flow is developed on the basis of actual physical movement of gas. The series of peaks observed in tracer concentration data records are explained by a bulk lateral movement of gas induced by large bubbles. A simple mathematical technique is suggested for the analysis of tracer data. As a result of the application of the meandering flow model the turbulent and meandering dispersion coefficients are defined. Meandering of fluid through the bed does not contribute to gas mixing, and consequently the meandering dispersion coefficient has to be subtracted from the overall radial dispersion coefficient. Only the turbulent dispersion should be used in the evaluation of the extent of gas mixing in fluidized beds of large particles, which contributes to gas phase combustion.
Download or read book Steady State Radial Gas Flow Through Porous Media written by Agodichukwu S. C. Ezeudembah and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with the possible causes of anomalous gas flow behavior which has been observed on both Klinkenberg and visco-inertial plots at higher flow rates and pressures. In pursuance of this study, experiments were carried out at higher flow rates and pressures, and at lower flow rates and pressures, with the following objectives: 1. evaluation and re-arrangement of flow case studies for use in the experiments; 2. re-evaluations of the existing visco-inertial flow model equation which uses Forchheimer's quadratic equation; 3. consideration of stress and strain on the core during the course of radial flow under uniaxial confinement; 4. a check on the possibility of hysteresis effect. The plot profiles, obtained by conducting the experimental runs at higher flow rates and pressures, suggest a deviation from expected profiles which fit the visco-inertial flow model equation. By analysis, and model fitting, these profiles are found to fit Forchheimer's cubic equation. The log-log plot of the friction factor against the Reynolds number suggests an existence of some term beyond the visco-inertial flow regime. The plot profiles, obtained by conducting the runs at lower flow rates and pressures, conform to the visco-inertial flow model equation. Similar anomalous flow behavior, in which the apparent gas permeability increases for increasing flow rate, is found to be dependent on both the flow method, and the type of radial confinement used. Application of stress-strain analysis has proved to be a vital tool in the study of confining pressure effects on flow behavior. Hysteresis has been observed to be significant in the parameter estimated values. Both Forcheimer's quadratic and cubic equations have been derived by considering Navier-Stokes equations and dimensional analysis for the quadratic case, and kinetic energy equation of mean flow and dimensional analysis for the cubic case. The cubic term is regarded as an extension to the quadratic equation at higher flow rates. The physical existence of its main parameter, gamma, together with the flow regime in which it operates, is established by consideration of the boundary layer theory to the flow problem. Properties of gamma, obtained from experiment, agree with those obtained from theory. Similar runs were made under triaxial confinement, using a triaxial overburden radial cell. The results, however, are not conclusive due to design problems.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1967-03 with total page 1190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orifice Metering of Pulsating Gas Flow written by Cecil R. Sparks and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
