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4 edition of Investigation of turbulent flow in a reciprocating engine using particle image velocimetry found in the catalog.

Investigation of turbulent flow in a reciprocating engine using particle image velocimetry

J. A. Davis

Investigation of turbulent flow in a reciprocating engine using particle image velocimetry

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Published by National Library of Canada in Ottawa .
Written in English

Edition Notes

Thesis (M.Sc.) -- University of Toronto, 1999.

SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL19264057M
ISBN 100612460711

Prior to testing on the engine, the different head configurations were tested on a steady flow bench. Particle image velocimetry data were taken on a single plane, parallel to the piston surface, in the engine using both a low magnification to characterize the large-scale flow phenomena, and a high magnification to characterize the turbulence. Rotating the measurement plane ±10° revealed one or the other flow structure observed in the particle image velocimetry measurements. Thus, it was hypothesized that cycle-to-cycle variations in the swirl ratio result in the two different flow patterns in the particle image velocimetry plane. surface turbulent jets and report on a recently completed experimental study of the interaction of a cotlowing jet with the free surface. The mean flow scaling and the turbulent structure were measured. The vortical structure at the surface was determined using particle image velocimetry (P1V). The.   Particle Image Velocimetry (PIV) can be applied in an optical engine as a non-intrusive laser diagnostic technique to measure flow fields in a two-dimensional plane [9, 13, 14, 15]. In this technique, a pair of images is captured over a short time interval of Mie scattered light off seeding particles which should be chosen such that they.

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Investigation of turbulent flow in a reciprocating engine using particle image velocimetry by J. A. Davis Download PDF EPUB FB2

The turbulent boundary layer flow in internal combustion (IC) engines has a significant effect on the in-cylinder flow and the wall heat transfer. A detailed analysis of the in-cylinder near-wall flow was carried out on an optical steady flow test bench by using high-resolution particle image velocimetry (PIV) in order to characterize the in Author: Daming Liu, Tianyou Wang, Ming Jia, Wei Li, Zhen Lu, Xudong Zhen.

A detailed analysis of the in-cylinder near-wall flow was Investigation of turbulent flow in a reciprocating engine using particle image velocimetry book out on an optical steady flow test bench by using high-resolution particle image velocimetry (PIV) in order to characterize the in-cylinder boundary layer flow in this study.

The difference between the in-cylinder boundary layer and the canonical turbulent boundary layer was. High-speed particle image velocimetry and micro particle image velocimetry were used to study the boundary-layer flow field at the cylinder head of a motored internal combustion engine for three.

The flow pulsation and mixing coefficient were investigated using the PIV (Particle Image Velocimetry) for a dual-cooled annular fuel assembly application. As the test sections, two kinds of simulated 3 × 3 rod bundles for dual-cooled annular and cylindrical solid fuel assemblies were prepared, and their P / D s (Pitch-to-Diameter ratios) were Cited by:   INTRODUCTION.

Turbulent flow fields have been subject of experimental investigations for many decades. For example, the first systematic analysis of the coherent near wall structures in a turbulent boundary layer has been performed by means of qualitative flow visualization techniques employing tracers such as smoke in air flows or dyes in water flows, Kline et al ().Cited by: 2.

Abstract. Non-stationary turbulent flows are often encountered while starting or stopping a flow process. There are also designed non-stationary flow processes like the periodic flows in a reciprocating engine (also known as the piston engine) and the pulsatile flow through an prosthetic heart valve (Hirt et al).

Advanced powertrain technologies have improved engine performance with higher power output, lower exhaust emission, and better controllability. Chief among them is the development.

Particle image velocimetry (PIV) is an optical method of flow visualization used in education and research. It is used to obtain instantaneous velocity measurements and related properties in fluid is seeded with tracer particles which, for sufficiently small particles, are assumed to faithfully follow the flow dynamics (the degree to which the particles faithfully follow the flow is.

From particle image velocimetry measurements, the flowfield similarity behavior and the turbulent flame speeds of syngases flames are consistent with those observed in hydrocarbon and pure or diluted hydrogen flames. Laboratory Studies of the Flow Field Characteristics of Low-Swirl Injectors for Application to Fuel-Flexible Turbines,”.

The development and verification of new turbulence models for Reynolds-averaged Navier–Stokes (RANS) equation-based numerical methods require reliable experimental data with a d.

Using particle image velocimetry, the nonreacting and reacting flowfields were measured at five bulk flow velocities. The results show that the LSI flowfield exhibits similarity features. From the velocity data, an analytical expression for the flame position as function of the flowfield characteristics and turbulent flame speed has been deduced.

Experimental investigation of turbulent flow in a rotating straight channel with continuous ribs Combustion engine Turbulence simulations A time-resolved particle image velocimetry system is applied to provide insights into the main flow and turbulence mechanism.

Results show that rotation significantly changes main flow and turbulent. The flow fields in a dual Rushton impeller stirred tank with diameter of m (T) were measured by using Particle Image Velocimetry (PIV).Three different size impellers were used in the experiments with diameters of D = T, T and T, multi-block and ° ensemble-averaged approaches were used to measure the radial and axial angle-resolved velocity.

1. Introduction. The Wankel rotary engine is a promising energy system. There are two main types of rotary engines, based on the different ways of intake: side ported rotary engines and peripheral ported rotary ages of the Wankel rotary engine over the conventional reciprocating engine includes large specific power output from high allowable engine speed, simple.

A digital approach to the interrogation analysis of images of seeded flows in particle image velocimetry (PIV) enables us to process a large number of these images in a relatively short time period.

This makes it possible to apply this technique to the quantitative investigation of dynamics of coherent flow structures. Particle image velocimetry (PIV) measurements were performed in a wave tank under water waves propagating and breaking on a 1/15 sloping beach.

The wave transformation occurred in the surf zone over a large domain covering several wavelengths from. A micro particle image velocimetry has been performed to investigate tumble enhanced flow characteristics near piston top surface of a motored internal combustion engine for.

For the second method, a particle image velocimetry (PIV) system was used to measure the velocity profiles of flow in the same glass tube at Reynolds numbers ranging from approximately to The interaction of an impinging shock and a supersonic helium cooling film is investigated experimentally by high-speed particle-image velocimetry.

A laminar helium jet. Turbulent drag reduction of 30 ppm cetyltrimethyl ammonium chloride (CTAC) solution flow in a channel was investigated with particle image velocimetry (PIV) combining with proper orthogonal decomposition (POD).

Measurements were made at inlet fluid temperature of K and at Reynolds number × 10 4 (based on the channel height, bulk velocity, and solvent viscosity) for. Planar particle image velocimetry (PIV) and tomographic PIV (TPIV) measurements are utilized to analyze turbulent statistical theory quantities and the instantaneous turbulence within a single-cylinder optical engine.

Measurements are performed during the intake and mid-compression stroke at and RPM. TPIV facilitates the evaluation of spatially resolved Reynolds stress tensor (RST. Maeda's 41 research works with citations and reads, including: Bubble deformation and flow structure measured by double shadow images and PIV/LIF.

Abstract. A strong in-cylinder tumbling flow, which was produced by partially shrouding the lower periphery of the inlet valves, was measured in a three-valve twin-spark spark ignition (SI) engine using digital particle image velocimetry (PIV).

Journal Publications. Inanc, N. Chakraborty, A. Kempf, Analysis of mixture stratification effects on unstrained laminar flames, Combustion and Flamepp (). Apart from a thorough investigation of resolved and under-resolved simulations for periodic flow and turbulent flow in a round pipe, we study in detail the set-up of a simplified internal combustion engine with a valve/piston arrangement.

In Particle Image Velocimetry. Experimental Investigation of Operating Room Air Distribution in a Full-Scale Laboratory Chamber Using Particle Image Velocimetry and Flow Visualization. James McNeill, Jean Hertzberg, Zhiqiang(John) Zhai.

DOI: /jfcmv 6, Downlo Views Citations. Pub. In this experimental study, effects of intake port geometries on air-flow characteristics were investigated using tomographic particle imaging velocimetry (TPIV).

Experiments were performed using three experimental conditions, namely, swirl port open (SPO), tangential port open (TPO), and both port open (BPO) configurations in a single cylinder. We measured the flow field at the vertical center cross section of an optically accessible high-tumble flow engine using time-resolved particle image velocimetry.

There are many factors considered to be sources of CCV, we analyzed three factors: the intake jet distribution, distribution of vortex core position and trajectory of the fluid. The dynamics and multiple-cycle evolution of the incompressible flow induced by a moving piston through the open valve of a motored piston-cylinder assembly was investigated using direct numerical simulation.

A spectral element solver, adapted for moving geometries using an Arbitrary Lagrange/Eulerian formulation, was employed. Eight cycles were simulated and the ensemble- and.

Investigation of Unsteady Flow Fields for Flow Control Research by Means of Particle Image Velocimetry Reinhard Geisler, Andreas Schröder, Jürgen Kompenhans DOI: /jfcmv 3, Downloads 5, Views Citations.

the mean and turbulent flows inside an injector depend on the Reynolds number between idle and the onset of cavitation, using particle image velocimetry. Finally, it is to estimate the static pressure within the injector to comment on whether the flow upstream of the nozzles, which is associated with strong streamline curvature, is close to.

Characterization of the flow using hotwire anemometry and stereo particle image velocimetry (PIV) has been conducted. Regions of investigation include the downwash, above the vehicle, and far downstream. Investigation of several locations around the UAS show that dominant frequencies exist within the flow field.

Radiofrequency plasma stabilization of a low-Reynolds-number channel flow - Volume - Timothy J. Fuller, Andrea G. Hsu, Rodrigo Sanchez-Gonzalez, Jacob C. Small scale wind tunnel experiments were undertaken at the University of New Brunswick using Particle Image Velocimetry (PIV) to obtain time-averaged Turbulent Kinetic Energy (TKE), Reynolds stresses and vorticity.

The experiments were performed at Reynolds numbers ofandfor an angle of attack of 20 degrees. Experimental data, obtained using Stereo Digital Particle Image Velocimetry (S-DPIV), is presented for a submerged impacting water jet, operating in the turbulent regime (Re = ).

Profiles of time-averaged velocity, fluctuating velocity and shear stress are presented for the impaction region out to a radial distance of jet diameters. A time-resolved particle image velocimetry investigation of a cavity flow with a thick incoming turbulent boundary layer.

Phys. Flu () CrossRef Google Scholar. Investigation of wall heat transfer and thermal stratification under engine-relevant conditions using DNS Show all authors Dreizler, A., Sick, V.

High-speed micro particle image velocimetry studies of boundary-layer flows in a Yianneskis, M. Turbulent flow measurement by laser-Doppler Anemometry in a Motored Reciprocating Engine. Turbulence statistics in solid-liquid flow using a refractive index matching and particle image velocimetry technique Y K Agrawal, R Shokri, R.

Sea Sanders, D S Nobes. PSFVIP Experimental and Computational Study on Drainage Flow in Rain Gutters of Buildings E Ejiri, Y Oishi, K Iijima. PSFVIP For example, turbulent flames propagate faster than laminar flames and turbulent heat transfer allows the heating of a room to occur in seconds rather than hours.

Another feature of turbulent flows is that they always occur at high Reynolds numbers. This implies that turbulence originates from instabilities in the laminar flow. These. Velocity data were acquired using high-magnification particle image velocimetry with different port geometries (two), different port orientations (two), and with both shrouded and nonshrouded intake valves.

The data were analyzed using both an ensemble-average method and spatial-average method of defining the mean velocity field. Investigation of turbulent boundary layer structure using PIV "Instantaneous Planar Velocity Measurements with High Spatial Data Density in a Reciprocating Engine by Particle—Image.

Velocimetry," in. SAE Transactions, "Investigation of the Logarithmic Layer in Pipe Flow Using Particle Image Velocimetry,'' in.

Near Wall Turbulent.Fajardo, C, Sick, V. Flow field assessment in a fired spray-guided spark-ignition direct-injection engine based on UV particle image velocimetry with sub crank angle resolution. P Combust Inst ; .Numerical and Experimental Investigation of Turbulent Flows in a Diesel Engine This paper presents a study of the turbulence field in an optical diesel engine operated under motored conditions using both large eddy simulation (LES) and Particle Image Velocimetry (PIV).