This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Measurement and Multidimensional Prediction of Flow in a Axisymmetric Port/Valve Assembly
Annotation ability available
Sector:
Language:
English
Abstract
The results are reported of a combined experimental and computational study of steady flow through an axisymmetric valve/port assembly, the main objective of which was to assess the accuracy of the multidimensional model predictions of this flow. Measurements of the discharge coefficient, mean velocity and the turbulent Reynolds stress fields were obtained by hot-wire anemometry at various valve lifts. These were supplemented by flow visualisation studies. Predictions were made using a finite-volume method employing a body-fitted computational mesh and the k-ε turbulence model. Good agreement was found at low lifts, but at higher values this deteriorated due to the inability of the turbulence model to provoke the flow separations which occurred in the experiments. The conclusion is that for both idealised and practical ports multidimensional predictions will be of limited accuracy until better turbulence models become available.
Recommended Content
Authors
Citation
Gosman, A. and Ahmed, A., "Measurement and Multidimensional Prediction of Flow in a Axisymmetric Port/Valve Assembly," SAE Technical Paper 870592, 1987, https://doi.org/10.4271/870592.Also In
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel
Number: V96-4; Published: 1988-09-01
Number: V96-4; Published: 1988-09-01
References
- Taylor C F 1979 The internal combustion engines in theory and practice 1 MIT Press
- Gosman A D 1986 “Flow Processes in Cylinders” in Thermodynamics and Gas Dynamics in Internal Combustion Engines 2 Horlock J H Winterbone D Oxford University Press
- Williams T J Tindal M J 1979 “The prediction and measurement of gas flow in the combustion chamber of direct injection diesel engines” CIMAC 13th Int Congress on Combustion Engines Vienna Paper D24
- Hirotomi T Nagayama I Kobayashi S Yamamasu N 1981 “Study of induction swirl in a spark ignition engine” SAE 810496
- Monaghan M L Pettifer H F 1981 “Air motion and its effect on diesel performance and emissions” SAE 810255 .
- Tanaka K K 1929 “Air flow through suction valve of conical seat” Report of the Aero Research Institute Tokyo Imperial University 4 No 50
- Kastner L T Williams T J White J B 1964 “Poppet inlet valve characteristics and their influence on the induction process” Proc IMechE 178 1 36
- Fukutani I Watanabe E 1982 “Air flow through poppet intake valves - analysis of static and dynamic coefficients” SAE 820154
- Arcoumanis C Whitelaw J H 1985 “Fluid mechanics of internal combustion engines: a review” ASME-FED 28
- Gosman A D 1985 “Multidimensional modelling of cold flows and turbulence in reciprocating engines” SAE Fuels & Lubricants Trans 1 SAE 850344
- Brandstatter W Johns R J R Wigley G “The effect of inlet port geometty on in-cylinder flow structure” SAE 850499
- Arcoumanis C Begleris P Gosman A D Whitelaw J H 1986 “Measurements and calculations of the flow in a research diesel engine” SAE 861563
- Vafidis C Whitelaw J H 1984 “Steady and pulsating flow through a stationary intake valve of a reciprocating engine” Imperial College, Mech Eng Dept Fluid Section report, FS/84/04
- Bicen A F Vafidis C Whitelaw J H 1984 “intake valve and in-cylinder flow simulation for a reciprocating engine” Imperial College, Mech Eng Dept Fluids Section report, FS/84/9.
- Khalighi B El-Tahry S H Kuziak W R Jr 1986 “Measured steady flow velocity distributions around a valve/seat annulus” SAE 860462
- Bicen A F Vafidis C Whitelaw J H 1985 “Steady and unsteady flow through an intake valve of a reciprocating engine” J F Engg 107 413 420
- Arcoumanis C Vafidis C Whitelaw J H 1985 “Valve and in-cylinder flow generated by a helical port in a production Diesel engine” Proc Symp on Flows in Reciprocating Engines, ASME Winter Mtg Florida
- Gosman A D Tsui Y Y Vafidis C 1985 “Flow in a model engine with a shrouded valve - a combined experimental and computational study” SAE 850498
- El-Tahry S H Kalighi B Kuziak W R Jr 1986 “Unsteady-flow velocity measurements around an Intake valve of a reciprocating engine” SAE Congress Detroit February 1987.
- Arcoumanis C Vafidis C Vorropoulos G Whitelaw J H 1986 “Correlation between valve and in-cylinder flow in a motored reciprocating engine” ASME Automotive Engine Tech Symp Dallas 1987
- Isshiki Y Shimamoto Y Wakisaka T 1985 “Numerical predictions of effect of intake port configuration on the induction swirl intensity by three-dimensional gas flow analysis” Proc Int Symp on Diagnostics and Modelling of Combustion in Recirpocating Engines Tokyo
- “Investigation of the flow in an idealised port/poppet valve assembly” PhD thesis (in preparation) University of London
- Champagne F H Sleicher C A 1967 “Turbulence measurements with inclined hot-wires” JFM 28
- Ribeiro M M 1976 “The turbulence structure of free jet flows with and without swirl” PhD thesis University of London
- Muller U R 1982 “On the accuracy of turbulence measurements with inclined wires” J F M 119
- Shames I H 1982 Mechanics of Fluids 2nd McGraw-Hill
- Launder B E Spalding D B 1972 “Mathematical models of turbulence” Academic Press
- Launder B E Spalding D B 1974 “The numerical computation of turbulent flow” Comp Mech in Appl Mech and Eng 3 269
- Demirdzic I Gosman A D Issa R I Peric M 1986 “A calculation procedure for turbulent flow in complex geometries” To appear in Computers & Fluids 1987
- Escudier M P 1966 “The distribution of mixing length in turublent flow near wall” Imperial College Heat Transfer Section Report, TWF/TN11.
- Rodi W Celik I Demurw A O Scheuerer G Shirani I Leschziner M A Rostigo A K 1982 Proc 1980-81 AFOSR-HTTM-Stanford Conference on Complex Turbulent Flows Kline S J Cantwell B J Lilley G M III 1495
- Rodi W Scheuerer G 1986 “Scrutinizing the k-ε turbulence model under adverse pressure gradient conditions” J Fluid Eng 108
- Bradshaw P 1967 “The turbulence structure of equilibrium boundary layers” J Fluid Mech 29
- Gibson M Rodi W 1979 “A Reynolds stress closure model of turbulence applied to the calculation of a highly-curved mixing layer” J Fluid Mech 103
- Launder B E Priddin C H Sharma B 1977 “The calculation of turbulent boundary layers on spinning and curved surfaces” Trans ASME I 99 231
- Jones W P 1972 “Laminarization in strongly accelerated boundary layers” PhD thesis University of London
- Hanjalic K Launder B E 1976 “Contribution towards a Reynolds-stress closure for low-Reynolds-number turbulence” J Fluid Mech 74 4 593 610