Conjugate conduction-convection heat transfer model for the valve flow-field region of four-stroke piston engines
Abstract
A multidimensional method has been devised to solve the conjugate conduction-convection heat transfer process at the surface of a moving valve of finite thickness within the flow field of an operating four-stroke internal combustion (IC) engine. Heat exchange processes between the valve and the gases adjacent to these boundaries were also computed during the portions of the engine cycle when the valve was closed. Boundaries of the solution scheme were extended fixed distances into the piston and cylinder liner. The valve was simulated as having a small but measurable thickness for the purpose of heat transfer calculations and as being immeasurably thin for the purpose of other flow-field calculations. The effects of fluid entrainment caused by valve motion were also considered and modeled. The implicit finite-difference solution of the governing equations for the primitive variables in the flow field was conducted in three regions: one fixed in space and time, one using a stretching and compressing computational mesh, and one that moved with time without stretching or compressing. This paper reports use of the model to simulate a portion of an exhaust stroke for an axisymmetric four-stroke engine piston.
- Authors:
-
- Mechanical Engineering Dept., U.S. Naval Academy, Annapolis, MD (US)
- Publication Date:
- OSTI Identifier:
- 6242233
- Resource Type:
- Journal Article
- Journal Name:
- Numerical Heat Transfer, Part A: Applications; (USA)
- Additional Journal Information:
- Journal Volume: 18:3; Journal ID: ISSN 1040-7782
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; HEAT TRANSFER; CALCULATION METHODS; FLOW MODELS; FLUID FLOW; HEAT EXCHANGERS; MANY-DIMENSIONAL CALCULATIONS; THERMAL CONDUCTIVITY; ENERGY TRANSFER; ENGINES; HEAT ENGINES; MATHEMATICAL MODELS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; 420400* - Engineering- Heat Transfer & Fluid Flow; 330100 - Internal Combustion Engines
Citation Formats
Blank, D A. Conjugate conduction-convection heat transfer model for the valve flow-field region of four-stroke piston engines. United States: N. p., 1990.
Web. doi:10.1080/10407789008944795.
Blank, D A. Conjugate conduction-convection heat transfer model for the valve flow-field region of four-stroke piston engines. United States. https://doi.org/10.1080/10407789008944795
Blank, D A. 1990.
"Conjugate conduction-convection heat transfer model for the valve flow-field region of four-stroke piston engines". United States. https://doi.org/10.1080/10407789008944795.
@article{osti_6242233,
title = {Conjugate conduction-convection heat transfer model for the valve flow-field region of four-stroke piston engines},
author = {Blank, D A},
abstractNote = {A multidimensional method has been devised to solve the conjugate conduction-convection heat transfer process at the surface of a moving valve of finite thickness within the flow field of an operating four-stroke internal combustion (IC) engine. Heat exchange processes between the valve and the gases adjacent to these boundaries were also computed during the portions of the engine cycle when the valve was closed. Boundaries of the solution scheme were extended fixed distances into the piston and cylinder liner. The valve was simulated as having a small but measurable thickness for the purpose of heat transfer calculations and as being immeasurably thin for the purpose of other flow-field calculations. The effects of fluid entrainment caused by valve motion were also considered and modeled. The implicit finite-difference solution of the governing equations for the primitive variables in the flow field was conducted in three regions: one fixed in space and time, one using a stretching and compressing computational mesh, and one that moved with time without stretching or compressing. This paper reports use of the model to simulate a portion of an exhaust stroke for an axisymmetric four-stroke engine piston.},
doi = {10.1080/10407789008944795},
url = {https://www.osti.gov/biblio/6242233},
journal = {Numerical Heat Transfer, Part A: Applications; (USA)},
issn = {1040-7782},
number = ,
volume = 18:3,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}