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Monday, July 27, 2020 | History

2 edition of An analysis of ground erosion caused by jet downwash impingement found in the catalog.

An analysis of ground erosion caused by jet downwash impingement

by David V. Shuter

  • 297 Want to read
  • 14 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

  • Aeronautics

  • Edition Notes

    ContributionsNaval Postgraduate School (U.S.)
    The Physical Object
    Pagination1 v. :
    ID Numbers
    Open LibraryOL25159254M

    17th International Symposium on Applications of Laser Techniques to Fluid Mechanics Lisbon, Portugal, July, - 1 - Effect of bed form evolution on sediment erosion and suspended load transport in an impinging jet Ken T Kiger1,*, Kyle Corfman1, Rahul Mulinti1 1: Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USAFile Size: 6MB. [24]). Indeed, the azimuthal instability modes of the wall jet flow could be a con-tinuation of the helical shear layer structures of the inflowing jet which were, in some cases, known to survive after impingement (WIDNALL and TSAI [25], LuGT [26]) leading to large correlation between the wall jet and inflowing jet turbulence.

    Chapter 4- Agents of Erosion and Deposition. STUDY. PLAY. Terms in this set () shoreline. The place where land and a body of water meet. A type of erosion caused by wearing or scraping away by sand grains or other particles striking other . The volume loss due to erosion is a troublesome problem for slurry transportation systems e.g. mineral transport systems, ash disposal systems. The erosion wear due to the air borne particles in some devices such as jet planes and turbines is also significant due to very high impact velocity. Mechanism of Erosion Wear.

    D ynaflow, I nc. ® has experience with numerous research projects on materials resistance to erosion by cavitation and liquid droplet impact. Based on our experience, we offer accelerated erosion testing service and consulting services to our customer. We can conduct full range of R&D and consulting studies on material erosion, cavitation, and liquid impacts including .   It is important from the economics point of view to understand the behaviour of concrete under loading due to plain water jets. Investigations which are based on mass removal measurements, grain size analysis, and mercury intrusion show that the performance of failure can be described using fracture mechanics methods. The reactions of hardened cement paste Cited by: 3.

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An analysis of ground erosion caused by jet downwash impingement by David V. Shuter Download PDF EPUB FB2

LISTOFILLUSTRATIONS Table Page I. NozzleConfigurationsandRadialStations 23 II. TypesofTerrainCoveredbyAnalysis 24 Figure 1. FlowFieldModelofCircularImpingingJet 25 2. CFD study of Jet Impingement Test erosion using Ansys Fluent® and OpenFOAM® Article (PDF Available) in Computer Physics Communications.

an analysis of ground erosion caused by jet downwash impingement David V. Shuter Recent interest in military VTOL/STOL aircraft employing unprepared landing sites has led to. Two different configurations of the normal jet impingement test were implemented at distances of 5 mm and 25 mm. Fig.

1 shows the location of the boundary conditions. Schematics of both configurations are shown in Fig. 2(a) and (b). The velocity magnitude at the inlet of both was chosen to be uniform with a value of 10 m / each of the cases, one symmetry plane was Cited by: A simplified physical model is built up to study the swirl flow effect induced by a rotating disk on the jet impingement behaviors, which is adopted to simulate the grinding process.

To solve the definition problem of the interface between a rotating disk and a stationary plate in the computational simulation, a tiny gap is set between the rotating disk and the stationary : Liu Bo, Zhang Jing-zhou, Tan Xiao-ming.

NASA Techaical Manordum A Comprehensive Analysis of Cavitation and Liquid Impingement Erosion Data (UASA-la) A CCflPREBIIEIFE PISPLI5IS CF REZ-ZBC30 CAVflA'IICR ABD LIQUIC ICEIEGEPEbl EICSICI LATA (BASA) 18 p RC BOZ/!!E AC 1 CSCL 1lF Uncl aE 63/26 C7ttl P. Veerabhadra Rao and S. Young '-- Lewis Reswch Center Cl&and, File Size: KB.

Analysis of Potential for Jet-Impingement Erosion from Leaking Steam Generator Tubes During Severe Accidents (NUREG/CR) On this page: and leak rates of superheated steam through flaws in steam generator tubes and erosion of neighboring tubes due to jet impingement of superheated steam with entrained particles from core debris created.

Fusion Engineering and Design 19 () North-Holland Erosion of the target surface due to vertical impingement of a gas-solid suspension jet Akihiko Shimizu a and Shu Hasegawa b Department of Energy Conversion, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen, KasugaJapan b Kurume College of Technology, Cited by: 1.

Foam’s Lagrangian library. Two different Jet Impingement Test configurations are also compared and the differences highlighted.

Keywords: Fluent, OpenFOAM, multiphase, discrete phase model, erosion, Jet Impingement Test 1. Introduction Erosion by solid particle impingement is a very common process in many Size: 1MB. This paper is mainly concerned with the velocity dependence of the erosion of metallic materials by non-traversing water jets impinging normally in the air, using a cylindrical nozzle.

The experimental conditions are a discharge pressure of 28 MPa to MPa and a nozzle inner diameter of mm. jet for Reynolds numbers f to 30, and non-dimensional surface to jet exit spacing, H/D, from to 8. In the present paper, the relative magnitudes of the local heat transfer coefficients are compared to the fluctuating components and to the mean and root.

Experimental Characterization of Erosion in Abrasive Jet Impingement Tests Relatore: Prof. Ing. Stefano Malavasi Correlatori: Dott. Ing. Gianandrea Vittorio Messa Dott. Ing. Marco Negri Tesi di laurea Magistrale di: Luigi Piani Anno accademico / This practice covers the determination of material loss by gas-entrained solid particle impingement erosion with jet- nozzle type erosion equipment.

This practice may be used in the laboratory to measure the solid particle erosion of different materials and has been used as a screening test for ranking solid particle erosion rates of.

Erosion leads to loss of life of components in machinery and pipeline which handle slurry. In order to maximize life, proper selection of materials used is required. Slurry Jet Erosion Tester facilitates identification of best material under given operating conditions.

Rate of wear determined experimentally can be used to predict service life and life cycle [ ]. Final velocity of jet will be zero. If Ѳ is the inclination of jet from the surface of water then, According to impulse momentum theory, force of jet along the surface is: ρ A v (v-0) cosѲ = ρ A v.

2cosѲ. Torque = ρ A v. 2 cosѲ X r. Variation in Angular velocity (ὡ) depend on various operating condition of jet. Air jet erosion test on plasma sprayed surface by varying erodent impingement pressure and impingement angle Ajit Behera1*, Asit Behera2, S C Mishra3, S Pani4, P Parida5 1*Department of Metallurgical & Materials Engineering Indian Institute of Technology, Kharagpur, India.

Numerical modelling of impingement jet and deposition wall-boundary condition The CFD package Fluent and Gambit have been used for modelling the impingement jet.

In the model, air enters the domain at an average velocity of ms-1 through the top of a mm long tube before exiting and impinging against a wallFile Size: KB.

a) Jet impingement over a smooth cylinder with varying cylinder diameter. b) Effect of variation of Reynolds number on heat transfer and flow characteristics. In the present study 2D jet impingement cooling of cylindrical rods in crossflow is simulated.

A general purpose CFD code, ANSYS FLUENT a commercial CFD package, is. The submerged jet erosion test has become one of the most the predominant method of jet data analysis since the late s.

Figure 1. — Submerged jet erosion test device for laboratory and in situ use, and a schematic diagram including the stress profile applied to the soil boundary (Hanson and Cook ).

Data impingement (refs. 8 to 11) erosion processes, several analyses from other types of erosion devices, including details such as empirical relationships between erosion venturi, magnetostriction, and liquid jet impingement, rates and material properties were discussed.

The wall shear stress produced by the normal impingement of a jet on a flat surface By DENIS J. PHARES1y, used to con rm the impinging jet analysis presented for gas jets. The technique was Normal shear stress produced by impingement of a jet D Potential core Developing profile y, r x Fully developing profile 2b u.

Impingement jets can either be air-powered or use some form of liquid, typically water. High speed jet impingement on a component surface creates a thin boundary layer, and thus a high heat transfer equation. There are three common jet configurations: the free-surface jet, which uses dense liquid in a medium that is less dense, such as air; the.The air jet erosion tester has been developed to evaluate the erosion resistance of variety of materials and conforms to the specifications of ASTM G76 standard.

The principle of operation consists of subjecting the test sample to a jet of air carrying the erodent, through a tungsten carbide nozzle of a known diameter.