A 2-D oscillating flow analysis in Stirling engine heat exchanges

  • 3.73 MB
  • 2659 Downloads
  • English

National Aeronautics and Space Administration, Lewis Research Center, Institute for Computational Mechanics in Propulsion, For sale by the National Technical Information Service, distributor , [Cleveland, Ohio], [Springfield, Va
Flow distribution., Heat exchangers., K-Epsilon turbulance model., Oscillating flow., Stirling engines., Turbulent flow., Two dimensional
Other titlesTwo D oscillating flow analysis in Stirling engine heat exchanges.
StatementKyung H. Ahn and Mounir B. Ibrahim.
SeriesNASA technical memorandum -- 103781., ICOMP -- 91-04., ICOMP -- no. 91-4.
ContributionsIbrahim, Mounir., Lewis Research Center. Institute for Computational Mechanics in Propulsion.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL18077283M

A 2-D OSCILLATING FLOW ANALYSIS IN STIRLING ENGINE HEAT EXCHANGERS Kyung H. Ahn Institute for Computational Mechanics in Propulsion NASA Lewis Research Center, MS Brookpark Road Cleveland, Ohio and Mounir B.

Ibrahim Department of Mechanical Engineering Cleveland State University Cleveland, Ohio ABSTRACT A two-dimensional oscillating flow analysis was conducted, simulating the gas flow inside Stirling heat exchangers. Both laminar and turbulent oscillating pipe flow were investigated numerically for Re(max) = (Va = 80), (Va = ), (Va = ), and (Va = ).

The results are compared with experimental results of previous :// Get this from a library. A 2-D oscillating flow analysis in Stirling engine heat exchanges. [Kyung H Ahn; Mounir B Ibrahim; Lewis Research Center.

Institute for Computational Mechanics in Propulsion.]   A Survey of Oscillating Flow in Stirling Engine Heat Exchangers (NASA-CR) A SURVEY OF OSCILLATING FLOg IN STIRLING ENGINE HEAT EXCHANGEHS Annual Contractor Report [Ninnesota Univ.) p CSCL 20D G3/34 N Unclas _ Terrence W. Simon and Jorge R.

Seume University of Minnesota Minneapolis, Minnesota March Prepared for The alpha-type engine is one of three main types of Stirling engine arrangements.

The alpha-type engine uses two pistons that mutually compress, expand, and move the working gas between hot and cold spaces ().See, for instance, Martini for a more detailed description of the arrangements.

The tubular heat exchangers in the engine that are studied are realised by counter-flow :// Oscillating flow in a stirling engine heat exchanger Article in Applied Thermal Engineering s 45––23 December with Reads How we measure 'reads'   15th International Conference on Fluid Control, Measurements and Visualization MayNaples, Italy.

Paper ID 1. Experimental Measurement of Oscillating Flow in a Stirling Engine Regenerator. Songgang Qiu1,*, Koji Yanaga2. 1Faculty of mechanical and aerospace engineering, West Virginia University, Morgantown, USA. 2Department of mechanical and aerospace engineering, West A Stirling engine is an external combustion reciprocating engine that is able to use various types of fuels.

It operates quietly and produces less air pollution. A Stirling engine is classified in three main configurations: α type, β type, and γ type (Figures to ).In an α type configuration the engine has two separate pistons and ://   Stirling Cycle Machine Analysis. by Israel Urieli (latest update 5/10/).

dedicated to William T. Beale ( – ), inventor of the Free Piston Stirling Engine, Mentor and Friend. This web resource is intended to be totally self contained learning resource for the analysis and development of computer simulation of single phase, piston/cylinder Stirling cycle :// In Fig.

10, the axial qx(y, t) and normal qy(y, t) heat flow distributions are plotted in terms of y at certain times t = [0, π/2, π, 3π/2] over a cycle for F = and the following selected Stirling engines 89 works Search for books with subject Stirling engines.

Search.

Description A 2-D oscillating flow analysis in Stirling engine heat exchanges PDF

Free-piston Stirling engine/linear alternator hour endurance test Jeffrey Rauch Not In Library. A 2-D oscillating flow analysis in Stirling engine heat exchanges book, Performance tests, Research, Heat transfer, Heat-engines, Oscillating flow, Space vehicles, Stirling cycle, System analysis Three heat exchangers exist in modern Stirling engines: a heater, a cooler, and a regenerator.

Here a study that deals principally with tubular heaters and coolers is carried out. The calculation procedure for the oscillating flow heat transfer is presented.

Literature sources are studied to find the most suitable correlations by comparing them to each other and to the classical turbulent flow   I. NASA Technical Memorandum Two-Dimensional Numerical Simulation of a Stirling Engine Heat Exchanger 4 BALSA-T I- 10 2 0 57) 'I LO-DI.

fl EES 1C L A L UH8B IC AI, ~a~3 SXEULATICI OF A SZIRI EIGIfi EEIT kXCClAlYGEB (LASA. Leuis Bestarch Center) 13 p CSCLUnclaz 63/34 02 Mounir B. Ibrahim Cleveland State Universityhita, and a, Flow and heat transfer characteristics the Stirling engine regenerator in an oscillating flow, The Japan society of mechanical engineers, JSME International Multi-objective optimization for GPU3 Stirling engine by combining multi-objective algorithms proposed a velocity model for studying the effect of oscillating flow of Stirling engine on heat and mass transfer and also investigated the influence of heating power, frequency and gas pressure.

They proposed a correlation for to predict the heat   OVERVIEW OF HEAT TRANSFER AND FLUID FLOW PROBLEM AREAS ENCOUNTERED IN STIRLING ENGINE MODELING Roy C. Tew, Jr. National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio NASA Lewis Research Center has been managing Stirling engine development Experimental study on heat transfer of oscillating flow of a tubular Stirling engine heater Article in International Journal of Heat and Mass Transfer –7 April with Reads   The Reversing Flow Test Facility (RFTF) is intended for the study of fluid flow and heat transfer under the reversing-flow conditions that occur in Stirling engines.

the facility consists of four major parts: (1) Mechanical Drive - two cylinders with cam-driven pistons which generate the reversing gas flow, (2) Test Section - a U-shaped section containing instrumented test pieces, (3   CFD Modeling of Free-Piston Stirling Engines Mounir B.

Ibrahim Cleveland State University, Cleveland, Ohio one heat exchanger flow passage to the other and/or b) across the regenerator (1-D codes assume uniform flow).

experimental finding for better understanding of Stirling engine flow and heat transfer processes, Request PDF | OnI. Barreno and others published Numerical study of the friction losses in Stirling engine heat exchangers | Find, read and cite all the research you need on ResearchGate This paper describes an experimental study of heat transfer in oscillating flow inside a cylindrical tube.

Profiles of temperature are taken inside the wall and in the fluid from an instrumented test rig, in different conditions of oscillating flow.

Profiles obtained allow the observation of the wall effect on heat ://   5 American Institute of Aeronautics and Astronautics. Q̇ c is heat transfer rate out from the Stirling cold side, Q̇ H is heat transfer rate moving into the Stirlinghot side, Ẇ stirling is the work rate by the Stirling, Ẇ brayton is work rate done by the gas turbine, LPC is the low pressure compressor, and LPT is the low pressure turbine.

Figure 4. Block diagram of Strayton NPSS mo Downloadable (with restrictions). A high performance model Stirling engine, in which the heater, regenerator and cooler as a whole is formed by hundreds of porous metal sheets, is identified for theoretical analysis to facilitate the future scale-up design.

The reciprocating flow and heat transfer both in the heat exchanger and in the full engine is simulated by a dynamic mesh Computational Free-Piston Stirling Engines (FPSEs) have recently attracted attention as a promising energy conversion technology because of their desirable characteristics such as high efficiency, high reliability, and easy and quiet operation.

FPSE are truly a closed cycle system that works using variations in the internal pressure to drive the power piston that is connected to the reciprocating magnets in /free-piston-stirling-engine-generators.

A reciprocating engine, also often known as a piston engine, is typically a heat engine (although there are also pneumatic and hydraulic reciprocating engines) that uses one or more reciprocating pistons to convert pressure into a rotating article describes the common features of all types.

The main types are: the internal combustion engine, used extensively in motor   @article{osti_, title = {Resonator coiling in thermoacoustic engines}, author = {Olson, J R and Swift, G W}, abstractNote = {Coiling the resonator of a thermoacoustic engine is one way to try to minimize the engine`s size.

However, flow in bent pipes is known to alter the fluid flow pattern because of centrifugal forces. Theory and measurements will be presented on the energy dissipation Fig. 1 shows the schematic diagram of the geometry for the helical rectangular channel heat exchanger.

In the Stirling engine or refrigerator, the void volume of heat exchanger has a great influence on its performance [15,16].For comparing the heat transfer and pressure drop of different heat exchangers with the same void volume, the cross-sectional areas of each simulation model are set at a Abstract.

An electrically driven pulse tube cryocooler that produces W of refrigeration at 80 K is now available from Praxair Inc.

Download A 2-D oscillating flow analysis in Stirling engine heat exchanges EPUB

The unit can be used to provide refrigeration by de-superheating, liquefying and/or subcooling a stream of ://   A new type of thermoacoustic engine based on traveling waves and ideally reversible heat transfer is described. Measurements and analysis of its performance are presented.

This new engine outperforms previous thermoacoustic engines, which are based on standing waves and intrinsically irreversible heat transfer, by more than 50%. At its most efficient operating point, it delivers W of   Chapter 5a - Scaling Parameters.

Forced convection heat transfer is fundamental to Stirling engine operation.

Details A 2-D oscillating flow analysis in Stirling engine heat exchanges EPUB

Heat is transferred from the external heat source to the working fluid in the heater section, cyclicly stored and recovered in the regenerator, and rejected by the working fluid to the external heat sink in the cooler ://.

A new regenerator matrix design that improves the efficiency of a Stirling engine has been developed in a numerical study of the existing SM5 Stirling engine. A new, detailed, one-dimensional Stirling engine model that delivers results in good agreement with experimental data was used for mapping the performance of the engine, for mapping the effects of regenerator matrix temperature   Chapter 5b - Regenerator Simple Analysis.

More recently Allan Organ published a book "The Regenerator and the Stirling Engine " (John Wiley, In heat exchanger analysis it is more usual to evaluate local heat exchanger parameters in terms of fluid property values which are independent of ://An experiment was designed and carried out on the fundamental, but poorly understood problem of oscillating flow past a single, transverse, circular cylinder.

This is an approximation of the flow about a single element in a matrix-type regenerator used in Stirling-cycle engines.

The experimental rig was designed and built to allow tests to be carried out for the wide range of fluid flow