Experimental burn-out and hydraulic instability investigations

by E. Rolstad in [Halden]

Written in English
Published: Pages: 91 Downloads: 292
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Subjects:

  • Boiling water reactors.

Edition Notes

Bibliography: p. 70-71.

Statementby E. Rolstad, G. Kjaerheim and K. Svanholm.
ContributionsKjaerheim, Gudolf, 1933- joint author., Svanholm, K., joint author.
Classifications
LC ClassificationsTK9203.B6 O34 no. 78
The Physical Object
Pagination4 l., 91 p.
Number of Pages91
ID Numbers
Open LibraryOL5659911M
LC Control Number68106508

kirby, g j. burnout in climbing-film two-phase flow.a review of theories of the kingdom: n. p., web.   Hydraulic parameters, such as the flow rate and concentration of the slurry, play an important role in the formation of hydraulic fills. Grain size, distribution, segregation, and density, and slope inclination are the main characteristics of tailings dams, which are affected by the hydraulic parameters of the slurry. Experimental data for static flow instability or flow excursion (FE) at conditions applicable to the Advanced Neutron Source Reactor are very limited. A series of FE tests with light water flowing vertically upward was completed covering a local exit heat flux range of MW/m{sup 2}, exit velocity range of m/s, exit pressure. Experimental investigation of Rayleigh Taylor instability in elastic-plastic materials - Aaron Haley, Pamela Roach and Arindam Banerjee –APS-DFD, Nov. , Long Beach, California. Effect of initial conditions on a high Schmidt-number Rayleigh-Taylor mixing layer – Raghu Mutnuri and Arindam Banerjee –APS-DFD, Nov. , Long.

  The authors have collected research and other literature on instability issues with coolant flow in power equipment to provide an overview of experimental and predictive investigation results that focused on thermal-hydraulic flow instabilities in equipment used in thermal and nuclear installations. Figure 1 depicts the schematic layout of an experimental hydraulic rig that is designed to test the behaviour of a pressure release valve. Preliminary experimental data for this rig has indicated the propensity of the valve to self-oscillate at around Hz for a range of flow speeds and for there to be significant hysteresis between the.   Free Online Library: Experimental Investigation on Seepage Stability of Filling Material of Karst Collapse Pillar in Mining Engineering.(Research Article) by "Advances in Civil Engineering"; Engineering and manufacturing Coal industry Analysis Models Groundwater Mineral industry Mining industry Permeability Porosity Seepage (Hydrology) Testing equipment Water, Underground. Wellbore strengthening by lost circulation materials (LCMs) is a commonly applied method for mitigating lost circulation. This paper presents a hydraulic fracturing apparatus to investigate the effect of material type, concentration, and particle size distribution (PSD) of LCMs on wellbore strengthening behavior.

On Density Wave Instability Phenomena – Modelling and Experimental Investigation Fig. 2 depicts a typical stability map for a boiling channel system on the stability plane Npch– Wan, C.F., and Fell, R. Experimental investigation of internal instability of soils in embankment dams and their foundations. UNICIV Rep. R, The University of . The proposed research of this experimental investigation aims to study the effects of fines content, fabrics type and confining pressure on the undrained shear strength response of Chlef sand-silt. @article{osti_, title = {THERMAL AND HYDRAULIC DESIGN OF THE CONSOLIDATED EDISON THORIUM REACTOR}, author = {Ferrell, J K and Flora, H E and Hostetler, D R and Stanek, L J and Vannoy, W M}, abstractNote = {ABS>The thermal and hydraulic analyses, both steady state and transient for the CETR are presented. Methods of calculations are discussed and results of analyses .

Experimental burn-out and hydraulic instability investigations by E. Rolstad Download PDF EPUB FB2

R Keith Mobley, in Plant Engineer's Handbook, Hydraulic instability (vane pass) Hydraulic or flow instability is common in centrifugal pumps.

In addition to the restrictions of the suction and discharge discussed previously, the piping configuration in many applications creates instability.

Although flow through the pump should be laminar, sharp turns or other restrictions in the inlet. Experimental Investigation of Flow Instability Between Two Vertical Parallel Channels Using Supercritical CO 2.

An Experimental Investigation of Flow Instability Between Two Heated Parallel Channels With Supercritical Water,” Design and Construction of a Test Rig to Analyze Thermal-Hydraulic Phenomena in Two-Phase : Anantvir Singh Saini, Vijay Chatoorgoon, Dhanashree S.

Ghadge. Experimental investigation of shale imbibition capacity and the factors influencing loss of hydraulic fracturing fluids. Petroleum Science12 (4), DOI: /s Tianyu Chen, Xia-Ting Feng, Zhejun Pan.

Experimental study of swelling of organic rich shale in by: This book presents the latest experimental and numerical analysis work in the field of ground deformation and base instability of deep excavations in soft clay subjected to hydraulic uplift.

The authors’ latest research findings, based on dimensional analyses, well-instrumented full-scale field. This book presents the latest experimental and numerical analysis work in the field of ground deformation and base instability of deep excavations in soft clay subjected to hydraulic uplift.

The authors’ latest research findings, based on dimensional analyses, well-instrumented full-scale field tests, systematic coupled-consolidation finite.

In addition to the experimental study, a numerical simulation of the SHUNCL loop has been prepared using the RELAP5 code in order to more investigate the effect of thermal hydraulic parameters on the instability of the operating system. System pressure, inlet subcooling, chimney length, orificing diameter and the heat section length are analyzed.

theoretical and experimental investigations of waterhammer attenuation by cut-off and bypass valves in pipeline systems of hydraulic turbomachines Book January with 48 Reads How we measure.

Hydraulic machinery such as turbines and pumps is widely used around the world. Related topics concerning design, operation and maintenance are of relevant interest. In this context, cavitation is a phenomenon to be taken into account, and this was treated in the XVIII IAHR Symposium on.

Analytical and experimental investigation of pore pressure induced strain softening around boreholes In order to understand the Experimental burn-out and hydraulic instability investigations book processes involved in sand production and borehole instability, experimental hollow cylinder test has been long performed.

20 Within many experiments conducted, specific setups were designed to observe. The main objective of this paper is to characterize the flow field on the front face of an oscillating wave surge converter (OWSC) under a regular wave.

For this purpose, the longitudinal and vertical velocity components were measured using an Ultrasonic Velocity Profiler (UVP). In order to explain the main trends of the OWSC’s dynamics, the experimental data were firstly compared with. A 3 × 3 rod bundle channel was used as the test section.

The experimental results show that PDO can occur in the closed NC loop when the pressurizer is installed on the upstream of the heating channel. The large amplitude thermal–hydraulic parameters oscillations and.

Thermal-hydraulic instability can potentially impair thermal reliability of reactor cores or other power equipment components. Thus it is important to address stability issues in power equipment associated with thermal and nuclear installations, particularly in thermal nuclear power plants, chemical and petroleum industries, space technology, and radio, electronic, and computer cooling systems.

From the results of the investigation, it can be found that: (1) for LPB at 23 MPa, only lower threshold was obtained as flow instability power boundary; and for HPB at 23 MPa, both lower and upper thresholds were obtained as flow instability power boundaries.

The study showed that including wall-heat storage, for this two channel systems, has a very minor effect on the flow instability boundary. Additionally, the accuracy of the supercritical flow dimensionless parameters proposed by Ambrosini and Sharabi, to convert experimental CO 2 instability data to water within the same loop, was examined.

Pennacchi, P., Borghesani, P., Chatterton, S., and Vania, A. "Hydraulic Instability Onset Detection in Kaplan Turbines by Monitoring Shaft Vibrations." Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference.

The draft tube of a hydraulic turbine is the component where the flow exiting the runner is decelerated, thereby converting the excess of kinetic energy into static pressure.

However, in some refurbishment cases, the installation of an upgraded runner with an old draft-tube leads to an undesirable efficiency drop as the discharge is increased.

Important experimental parameter ranges were: to bar channel exit pressure; to 4, kg/m{sup 2}s mass flux (1 to 5 m/s inlet velocity); 0 to MW/m{sup 2} channel wall heat flux; and 7, Peclet number at the onset of flow instability.

Hydraulic turbines are more frequently used for power regulation and thus spend more time providing spinning reserve for electrical grids. Spinning reserve requires the turbine to operate at its synchronous rotation speed, ready to be linked to the grid in what is termed the speed-no-load (SNL) condition.

Thermal-hydraulic instability can potentially impair thermal reliability of reactor cores or other power equipment components.

Thus it is important to address stability issues in power equipment associated with thermal and nuclear installations, particularly in thermal nuclear power plants, chemical and petroleum industries, space technology, and radio, electronic, and computer cooling systems.

Hydraulic Jump Experiment: Coefficient of Discharge of Venturi Flume: Objectives of the Experiment. Theory & Background. Apparatus Used.

Procedure of the Practical. Results. Sources of Errors. Apparatus & Chemicals Used. Procedure of the Practical. Characteristics of Flow over a Triangular Notch: Coefficient of Discharge of Sharp. Get this from a library. A Numerical And Experimental Investigation Of Flow Induced Noise In Hydraulic Counterbalance Valves.

[Mutasim Mohamed Elsheikh; Porteiro, Jose L.,; Weber, Steven T.,] -- The main objective of this study is to explore the complex fluid flow phenomena that result in the generation of a high frequency noise in counterbalance valves through an experimental and. The typical experimental investigations of these instabilities in tube boiling systems are indicated and the most popular models to predict the two-phase flow dynamic instabilities, namely the.

In hydraulic systems using servo control valves, contamination in the 5 micron range can cause intermittent spool jamming, slow response or instability and eventually cause spool valve surface erosion and solenoid burnout. Contamination in gear and vane pumps will cause scoring of gear teeth, housings, vane tips and cam rings respectively.

Therefore, the hydraulic turbines have to operate far away from the best efficiency point (BEP) covering a wide range. As a result, the self-induced instability flow called vortex rope is developed downstream the runner, in the draft tube cone at part load conditions.

Guggenberger M., Senn F., Schiffer J., Jaberg H., Gentner C., Salla Berger M., Widmer C. Experimental investigation of the turbine instability of a pump turbine during synchronization. In: Proceedings of the 27th IAHR symposium on hydraulic machinery and systems (IAHR ), IOP conference series: earth and environmental science.

Labyrinth weirs provide higher discharge capacity than conventional weirs, with the ability to pass large flows at comparatively low heads. Labyrinth weirs are primarily used as spillways for dams where the spillway width is restricted. In recent years, many research investigations have considered the hydraulic performance of labyrinth weirs, particularly as dependent on the geometric features.

The overall agreement of the experimental and numerical results can be stated as remarkably good. Conclusions. Experimental tests presented in the paper in hand show that the critical hydraulic gradient for upward seepage flow is dependent on the instability index of.

Furthermore, numerical analyses are carried out to study the leakage-induced slope instability. Based on the experimental and numerical results, the following phenomena are observed: (1) when bottom outlet leakage occurs, the whole phreatic line is elevated and hydraulic head increases significantly at the leaking position.

Hydraulic fracturing, as an effective stimulation method, is widely used in enhancing unconventional gas production, such as shale gas, tight sandstone gas, and coal bed methane.

Recently, lots of researchers investigate the impact of fracturing fluids on the propagation of hydraulic fractures. Shallow soil slips are a significant hydrogeological hazard which could affect extended areas of the high-gradient mountainous landscape.

Their triggering is highly dependent on the rainfall water infiltration and its further redistribution, as well as the characteristic properties of the soil itself. The complex interaction between those factors generates a considerable degree of uncertainty.

Technical Report: Experimental study of static flow instability in subcooled flow boiling in parallel channels. Abstract. This chapter mainly focuses on the instability of hydraulic turbine system. The stability of pumping system and the nonlinear models of hydraulic turbine system transient in hydro power plants are also introduced.Instability in soils was governed by specific combinations of their geo-hydro-mechanical characteristics such as PSD, R d, stress reduction factor, critical hydraulic gradients and associated effective stress levels.

These factors are combined to model the development and inception of instability, and the paper offers visual guides as a.