Performance Effects of a Round Bar Passing Through the Outlet of a Vortex Amplifier

1991 ◽  
Vol 113 (4) ◽  
pp. 696-701
Author(s):  
K. Sato ◽  
N. Syred
Keyword(s):  
Heat Treatment ◽  
Swirling Flow ◽  
Flow Patterns ◽  
Vortex Chamber ◽  
Surface Heat ◽  
Control Flow ◽  
Water Model ◽  
Swirl Burner ◽  
High Heat Transfer ◽  
Round Bar

This paper considers the application of a vortex amplifier (VA) to the process of coating and surface heat treatment of a round bar. The advantage of using a vortex amplifier is not only a long maintenance free lifetime but also the ease with which the coating thickness or the heat treatment condition may be changed. Swirl burners offer many advantages in the surface heat treatment of round bars. The highly turbulent swirling flow generates uniform heat distribution and very high heat transfer coefficients which improve the quality of the surface being treated. The geometry of the swirl burner is such that very long bars may be treated using a relatively small burner, the bar being passed along the axis of the swirl burner. For coating applications, the round bar to be treated passes along the axis of the outlet of the vortex amplifier and the coating process is controlled by varying the control flow in the VA. Clearly the bar will have an effect on the performance. The effects of changing the diameter of the round bar are investigated. The effect of poor alignment of the round bar on the variations of supply pressure and control pressure is also considered. The flow patterns in the vortex chamber and the outlet were observed by means of cotton tufts. The internal flow patterns in the vortex chamber were observed using water model studies at a number of points on the vortex amplifier characteristic.

Round Bar Heating With Swirl Burners

1988 ◽  
Vol 110 (3) ◽  
pp. 254-258 ◽  
Author(s):  
K. Sato ◽  
M. Biffin ◽  
S. A. MacGregor ◽  
N. Syred
Keyword(s):  
Surface Hardening ◽  
Swirling Flow ◽  
High Heat ◽  
Small Scale ◽  
Uniform Heating ◽  
Swirl Burner ◽  
High Heat Transfer ◽  
Steel Bar ◽  
Steel Bars ◽  
High Heat Transfer Rate

A method of heating round steel bars using a swirl burner or swirl burner furnace combination is described. This technique is suitable for surface hardening or processing of long steel bars. The uniform heating around the steel bar, coupled with the high heat transfer rate of the swirling flow, allows a relatively small swirl burner to be used. Experimental results are presented from small-scale prototype trials with a 200 kW burner and 25 mm diameter mild steel bars.

A new approach to control and optimize the laser surface heat treatment of materials

2018 ◽  
Vol 262 ◽  
pp. 492-502 ◽  
Author(s):  
Sagar V. Telrandhe ◽  
Jayabalan Bhagyaraj ◽  
Sushil Mishra ◽  
Shyamprasad Karagadde
Keyword(s):  
Heat Treatment ◽  
Surface Heat ◽  
Laser Surface ◽  
New Approach

The Model Analysis of Inclusion Moving in the Swirl Flow Zone Sourcing from the Inner-Swirl-Type Turbulence Controller in Tundish

2017 ◽  
Vol 36 (5) ◽  
pp. 541-550 ◽  
Author(s):  
Yan Jin ◽  
Chen Ye ◽  
Xiao Luo ◽  
Hui Yuan ◽  
Changgui Cheng
Keyword(s):  
Flow Field ◽  
Swirling Flow ◽  
Mathematic Model ◽  
Swirl Flow ◽  
Water Model ◽  
Medium Size ◽  
Force Analysis ◽  
Inclusion Removal ◽  
Flow Band ◽  
Turbulence Inhibitor

AbstractIn order to improve the inclusion removal property of the tundish, the mathematic model for simulation of the flow field sourced from inner-swirl-type turbulence controller (ISTTC) was developed, in which there were six blades arranged with an eccentric angle (θ) counterclockwise. Based on the mathematical and water model, the effect of inclusion removal in the swirling flow field formed by ISTTC was analyzed. It was found that ISTTC had got the better effect of inhibiting turbulence in tundish than traditional turbulence inhibitor (TI). As the blades eccentric angle (θ) of ISTTC increasing, the intensity of swirling flow above it increased. The maximum rotate speed of fluid in swirling flow band driven by ISTTC (θ=45°) was equal to 25 rmp. Based on the force analysis of inclusion in swirling flow sourced from ISTTC, the removal effect of medium size inclusion by ISTTC was attributed to the centripetal force (Fct) of swirling flow, but removal effect of ISTTC to small size inclusion was more depend on its better turbulence depression behavior.

Sleptsov Net Computing

2018 ◽  
pp. 7731-7743 ◽  
Author(s):  
Dmitry A. Zaitsev
Keyword(s):  
Fuzzy Logic ◽  
Partial Differential Equations ◽  
Differential Equations ◽  
Flow Patterns ◽  
Data Encryption ◽  
Parallel Execution ◽  
Control Flow ◽  
Arithmetic Operations ◽  
Input And Output ◽  
New Models

Motivation for new models of hyper-computations was presented. Sleptsov net was introduced compared to Petri and Salwicki nets. A concept of universal Sleptsov net, as a prototype of a processor in Sleptsov net computing, was discussed. Small universal Sleptsov net that runs in polynomial time was constructed; it consists of 15 places and 29 transitions. Principles of programming in Sleptsov nets, as composition of reverse control flow and data, have been developed. Standard control flow patterns include sequence, branching, loop, and parallel execution. Basic modules, which implement efficiently copying, logic, and arithmetic operations, have been developed. Special dashed arcs were introduced for brief specification of input and output data of modules (subnets). Ways of hierarchical composition of a program via substitution of a transition by a module were discussed. Examples of Sleptsov net programs for data encryption, fuzzy logic, and partial differential equations have been presented. Enterprise implementation of Sleptsov net programming promises ultra-performance.

Central vascular flow patterns in the alligator Alligator mississipiensis

1995 ◽  
Vol 269 (5) ◽  
pp. R1133-R1139 ◽  
Author(s):  
G. M. Malvin ◽  
J. W. Hicks ◽  
E. R. Greene
Keyword(s):  
Vagus Nerve ◽  
Swirling Flow ◽  
Vagal Stimulation ◽  
Contrast Echocardiography ◽  
Flow Patterns ◽  
Left Ventricular ◽  
Vascular Flow ◽  
The Right ◽  
Alligator Mississipiensis ◽  
Central Circulation

Many different flow patterns have been described through the central circulation of crocodilian reptiles. We tested the hypothesis that the vagus nerve stimulation promotes right-to-left (R-L) shunting in the alligator. Flow patterns were investigated before and during stimulation of the intact left vagus nerve using three methods. 1) Atrial and aortic PO2 were measured simultaneously and continuously by gas probes. 2) Atrial outflows were tracked with a blood tracer (helium). 3) Flows were assessed with echocardiography. Four different flow patterns were observed before vagal stimulation: left ventricular (LV) blood flowed into both the right (RAo) and left (LAo) aortas, whereas right ventricular (RV) blood flowed only into the LAo; both aortas received a mixture of LV and RV blood; only LV blood perfused both aortas; and RV blood flowed into both aortas, but LV blood flowed only into the RAo. During vagal stimulation, both aortas received a mixture of LV and RV blood in half of the animals, and in the other half, both aortas received RV blood, but LV blood flowed only into the RAo. Doppler and contrast echocardiography demonstrated swirling flow in the foramen of Panizza and the base of the LAo during systole. These data indicate that vagal stimulation either maintains or produces R-L shunting, flow patterns are variable, and blood can swirl in the foramen of Panizza and LAo base.

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