CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions

Research output: Contribution to conferencePaper

Abstract

The goal of this research is to contribute towards the development of predictive, physics-based computational fluid dynamics (CFD) models for studying advanced internal combustion (IC) engines with high efficiency and low emissions. The lack of accurate submodels for in-cylinder heat transfer has been identified as a key shortcoming to this end. Recent measurements of wall layers in engines show discrepancies of up to 100% with respect to standard CFD boundary-layer models. Additionally, available experimental data are quite sparse (only a few data points on engine walls) and limited (available measurements are those of heat flux only). Predictive submodels are needed for medium-resolution engineering LES and for unsteady Reynolds-averaged simulations (URANS). Recently, some research groups have performed DNS studies on engine-relevant conditions using simple geometries which provide very useful data for benchmarking computational models. While some recent sophisticated (one-equation) models have been incorporated as a part of the current work, others of a more detailed nature are underway. These include solving additional partial differential equations (PDEs) within the thin boundary layer near the wall and fall under the category of non-equilibrium models. The main aim of this project is to develop such two-zone models for engine wall heat transfer and to test them against available DNS/experimental data in both SI (spark-ignition) and CI (compression-ignition) engines. Ultimately it is also intended to include the effect of radiation in these models.

Original languageEnglish (US)
StatePublished - Jan 1 2018
Event2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 - State College, United States
Duration: Mar 4 2018Mar 7 2018

Other

Other2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
CountryUnited States
CityState College
Period3/4/183/7/18

Fingerprint

computational fluid dynamics
engines
Computational fluid dynamics
heat transfer
Engines
Ignition
boundary layers
Boundary layers
spark ignition
internal combustion engines
Benchmarking
Engine cylinders
Internal combustion engines
Electric sparks
direct numerical simulation
dynamic models
partial differential equations
ignition
Partial differential equations
Heat flux

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)

Cite this

Sircar, A., & Haworth, D. C. (2018). CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions. Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States.
Sircar, A. ; Haworth, Daniel Connell. / CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions. Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States.
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Sircar, A & Haworth, DC 2018, 'CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions' Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States, 3/4/18 - 3/7/18, .

CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions. / Sircar, A.; Haworth, Daniel Connell.

2018. Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States.

Research output: Contribution to conferencePaper

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Sircar A, Haworth DC. CFD-based non-equilibrium wall heat transfer models for engine-relevant conditions. 2018. Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States.