Two-dimensional shock tube flow for dense gases

Non-stationary oblique shock wave reflections for fluids in the dense gas regime are examined for selected cases. A time-accurate predictor-corrector TVD scheme with reflective boundary conditions for solving the Euler equations simulates the evolution of a wave field for an inviscid van der Waals gas near the thermodynamic critical point. The simulated cases involve shock tube flows with compressive wedges and circular arcs. Non-classical phenomena, such as disintegrating shocks, expansion shocks, composite waves, etc., demonstrate significant differences from perfect gas flow fields over similar geometries. Detailed displays of wave field structures and thermodynamic states for the dense gas flow fields are presented and analysed.

Download Full-text

Real gas flow fields about three dimensional configurations

10.2514/6.1983-581 ◽

1983 ◽

Cited By ~ 1

Author(s):

A. BALAKRISHNAN ◽

C. LOMBARD ◽

W.C. DAVY

Keyword(s):

Gas Flow ◽

Three Dimensional ◽

Flow Fields ◽

Real Gas

Download Full-text

Numerical Analysis of Flow Fields and Temperature Fields in a Regenerative Heating Furnace for Steel Pipes

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4038702 ◽

2018 ◽

Vol 10 (3) ◽

Cited By ~ 1

Author(s):

Yi Han ◽

Feng Liu ◽

Xin Ran

Keyword(s):

Temperature Field ◽

Flow Field ◽

Flow Velocity ◽

Gas Flow ◽

Flow Fields ◽

Heating Furnace ◽

Temperature Fields ◽

Turbulent Layer ◽

Steel Pipes ◽

Pipe Blanks

In the production process of large-diameter seamless steel pipes, the blank heating quality before roll piercing has an important effect on whether subsequently conforming piping is produced. Obtaining accurate pipe blank heating temperature fields is the basis for establishing and optimizing a seamless pipe heating schedule. In this paper, the thermal process in a regenerative heating furnace was studied using fluent software, and the distribution laws of the flow field in the furnace and of the temperature field around the pipe blanks were obtained and verified experimentally. The heating furnace for pipe blanks was analyzed from multiple perspectives, including overall flow field, flow fields at different cross sections, and overall temperature field. It was found that the changeover process of the regenerative heating furnace caused the temperature in the upper part of the furnace to fluctuate. Under the pipe blanks, the gas flow was relatively thin, and the flow velocity was relatively low, facilitating the formation of a viscous turbulent layer and thereby inhibiting heat exchange around the pipe blanks. The mutual interference between the gas flow from burners and the return gas from the furnace tail flue led to different flow velocity directions at different positions, and such interference was relatively evident in the middle part of the furnace. A temperature “layering” phenomenon occurred between the upper and lower parts of the pipe blanks. The study in this paper has some significant usefulness for in-depth exploration of the characteristics of regenerative heating furnaces for steel pipes.

Download Full-text

The simulation of dam-break flows by an improved predictor–corrector TVD scheme

Advances in Water Resources ◽

10.1016/s0309-1708(99)00051-2 ◽

2000 ◽

Vol 23 (6) ◽

pp. 637-643 ◽

Cited By ~ 17

Author(s):

Ming Hseng Tseng ◽

Chia R. Chu

Keyword(s):

Dam Break ◽

Tvd Scheme ◽

Predictor Corrector

Download Full-text

Steady small-disturbance transonic dense gas flow past two-dimensional compression/expansion ramps

Journal of Fluid Mechanics ◽

10.1017/jfm.2018.368 ◽

2018 ◽

Vol 848 ◽

pp. 756-787 ◽

Cited By ~ 4

Author(s):

A. Kluwick ◽

E. A. Cox

Keyword(s):

Gas Dynamics ◽

Gas Flow ◽

External Forcing ◽

Two Dimensional ◽

Small Disturbance ◽

Dense Gas ◽

Dimensional Flow ◽

Flow Past ◽

Two Dimensional Flow ◽

Dimensional Parameters

The behaviour of steady transonic dense gas flow is essentially governed by two non-dimensional parameters characterising the magnitude and sign of the fundamental derivative of gas dynamics ($\unicode[STIX]{x1D6E4}$) and its derivative with respect to the density at constant entropy ($\unicode[STIX]{x1D6EC}$) in the small-disturbance limit. The resulting response to external forcing is surprisingly rich and studied in detail for the canonical problem of two-dimensional flow past compression/expansion ramps.

Download Full-text