Numerical Predictions of Flow and Thermal Fields in a Reciprocating Piston-Cylinder Assembly

Cheng, Chin‐Hsiang; Hung, Kuo Shu

doi:10.1080/104077800750022539

Cited by 12 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The grid speeds are represented by . In order to compare the current results with the previous studies from the start-up to periodically stable operation [6]. The air in the cylinder is initially at rest with hydrostatic condition.…”

Section: Governing Equationsmentioning

confidence: 91%

See 1 more Smart Citation

Numerical Simulation of Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines

Yang

Chu

2013

AMR

View full text Add to dashboard Cite

This study provides a detailed instantaneous heat transfer solution in a cylinder during a motored cycle. The piston-cylinder assembly is modeled by a two-dimensional cavity with a sinusoidal moving wall. A high order differential algorithm is used to solve the unsteady compressible Navier-Stokes equations. The order of differencing is raised progressively from the walls toward the center of the cylinder, enabling oscillation free and accurate calculation on a very coarse grid. The numerical fluxes are integrated based on the dual-time stepping of the preconditioned matrix with a third-order Runge-Kutta scheme. The absolute pressure is determined by enforcing the global mass conservation for each grid. The predicted results of the absolute pressure, temperature, and velocity components of the fluid inside the cylinder at any instant during the start-up and the periodically stable periods are compared well with the results given in the literature.

show abstract

Section: Governing Equationsmentioning

confidence: 91%

“…Cheng and Hung [6] developed a two-stage pressure correction procedure to solve unsteady compressible flow in a reciprocating piston-cylinder assembly. A test problem is used to demonstrate the robustness and accuracy of the scheme.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines

Yang

Chu

2013

AMR

View full text Add to dashboard Cite

show abstract

“…The solution methods for solving these above equations use the framework concept of the two-stage pressure-correction method proposed by Cheng and Hung [14]. The methods are described brie y in the following.…”

Section: Numerical Methods and Solution Proceduresmentioning

confidence: 99%

“…Further correction for the updated pressure P * is required to yield the absolute pressure. Therefore, the second-stage pressure-correction method described by Cheng and Hung [14] is used to yield the absolute dimensionless pressure ÿeld.…”

Section: Two-stage Pressure Correctionsmentioning

confidence: 99%

“…Unfortunately, detailed information regarding the ow and thermal behaviour of the periodic ow in the two-piston engines is still not available. Under these circumstances, in the present study, the numerical method proposed by Hung and Cheng [14] is extended to the analysis of the ows in an enclosure with two periodically moving walls to seek a fundamental understanding of the physical phenomena in the two-piston engines.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical predictions of flow and thermal fields in an enclosure with two periodically moving walls

Cheng

Hung

2006

Numerical Methods in Fluids

View full text Add to dashboard Cite

SUMMARYNumerical predictions of transient ow and thermal ÿelds in a rectangular enclosure with two periodically moving vertical walls are presented. The combined in uence of the movement of the walls and the buoyancy as well on the ow pattern and heat transfer performance is evaluated. The compressibleow model is adopted, and governing equations are expressed in integral form and discretized on the moving grids, which deform in resonance with the walls to accommodate the variation in the volume of the enclosure. A two-stage pressure-correction scheme is applied for simultaneously determining the distributions of absolute pressure, density, temperature, and velocity of the compressible ow ÿeld in the enclosure during the periodically stable periods. E ects of the frequency, stroke, and the phase angle of the wall oscillations on the ow are of major concerns in this study. The frequency is ranged between 5 and 25 Hz and the dimensionless strokes (l=H ) of the wall are varied from 0.4 to 1.0. Results for Nusselt numbers on the walls as well as the dimensionless input work required to excite the wall oscillation are provided.

show abstract

A mixed convection in a reciprocating $$\Uppi$$ shape channel with opposite direction of gravity and inlet cooling fluids

Lian

Lai

2008

Heat Mass Transfer

View full text Add to dashboard Cite

Numerical Predictions of Flow and Thermal Fields in a Reciprocating Piston-Cylinder Assembly

Cited by 12 publications

References 9 publications

Numerical Simulation of Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines

Numerical Simulation of Instantaneous Heat Transfer in Reciprocating Internal Combustion Engines

Numerical predictions of flow and thermal fields in an enclosure with two periodically moving walls

A mixed convection in a reciprocating $$\Uppi$$ shape channel with opposite direction of gravity and inlet cooling fluids

Contact Info

Product

Resources

About