scholarly journals Experimental Research on the Effect of Axial Power Distribution on Critical Power

2009 ◽  
Vol 3 (1) ◽  
pp. 301-312 ◽  
Author(s):  
Wei LIU ◽  
Masatoshi KURETA ◽  
Kazuyuki TAKASE
Keyword(s):  
Experimental Research ◽  
Power Distribution ◽  
Critical Power

An Experimental Research on the Effect of the Axial Power Distribution on the Critical Power

2008 ◽  
Author(s):  
Wei Liu ◽  
Masatoshi Kureta
Keyword(s):  
Experimental Research ◽  
Power Distribution ◽  
Atmospheric Pressure ◽  
Critical Power ◽  
Fuel Cycle ◽  
Circular Tube ◽  
Power Ratio ◽  
Uniform Heating ◽  
Dc Power ◽  
Detailed Evaluation

In this paper, an experimental research on the effect of the axial power distribution on the critical power is performed under the atmospheric pressure with using a circular tube. The circular tube is axially divided into 3 insulated levels and is heated separately by 3 DC power suppliers. Axial uniform heating condition, the upper three-layer simulation and the center three-layer simulation of the double-humped core of Innovative Water Reactor for Flexible Fuel Cycle (FLWR) are selected as the cases for the detailed evaluation. The effects of relative power ratio on the critical power, the critical quality and the critical boiling length under different heating conditions are ascertained for the detailed evaluation cases. With using the experimental data, existed correlating methods for the boiling transition are evaluated. As the result, a combination of the critical quality-boiling length (χBT – LB) method and the critical heat flux-critical quality (qBT – χBT) method is found a good correlating to the present data with a changed axial power distribution.

scholarly journals An Experimental Research on Design and Development of Tricopter

2019 ◽  
Vol 8 (3) ◽  
pp. 5119-5123
Keyword(s):  
Delivery System ◽  
Experimental Research ◽  
Power Distribution ◽  
Research Paper ◽  
Fire Service ◽  
Product Delivery ◽  
Flight Parameters ◽  
Third Law ◽  
Fundamental Forces ◽  
Thrust Forces

The paper is giving a detail description on the design and simulation of tricopter. As the tricopter runs on the newton third law of motion and thrust forces so the paper discussed the detail procedure to calculating the principle fundamental forces acting on the tricopter. This research paper presents the design steps for a tricopter with the use of motor, propeller, battery, flight controller and power distribution board. The CAD design of tricopter helps to visualise the major flight component of tricopter and its orientation. The major advantage of this tricopter is that it can balance various flight parameters like aileron, rudder and throttle. The application of this tricopter includes fire service, military surveillance, product delivery system and medico application. The objective is to provide the summary of design, calibration, and fabrication of the tricopter

MEFISTO: A Mechanistic Tool for the Prediction of Critical Power in BWR Fuel Assemblies

2008 ◽  
Author(s):  
Carl Adamsson ◽  
Jean-Marie Le Corre
Keyword(s):  
Power Distribution ◽  
Critical Power ◽  
Cross Flow ◽  
Flow Region ◽  
Computer Time ◽  
Equation Model ◽  
Fuel Bundle ◽  
Flow Information ◽  
Order Of Magnitude ◽  
Analysis Models

Westinghouse is currently developing the MEFISTO code with the main goal to achieve fast, robust, practical and reliable prediction of steady-state dryout Critical Power in Boiling Water Reactor (BWR) fuel bundle based on a mechanistic approach. To achieve this goal, the code resolves the multi-film mass balance equations at the sub-channel level within the annular flow region while relying on a simple two-field (liquid/steam) sub-channel solution to provide the cross-flow information. The MEFISTO code can hence provide detailed solution to the multi-film flow in BWR fuel bundle while enhancing flexibility and reducing the computer time by an order of magnitude as compared to standard three-field subchannel analysis. Models for the numerical computation of the sub-channel multi-film flowrate distributions, including the treatment of cross-flows, part-length rods and spacers grids are presented in this paper. The MEFISTO code is then applied to dryout prediction in BWR fuel bundle using VIPRE-W as a two-field sub-channel driver code (based on a fast and robust four-equation model). The dryout power is numerically predicted by iterating on the bundle power so that the minimum film flowrate in the bundle reaches the dryout criteria. Dryout predicted powers (including trends with flow, pressure, inlet subcooling and power distribution) and predicted dryout locations are compared to experimental results, using a large Westinghouse SVEA-96 dryout database, and are shown to yield excellent results.

scholarly journals EXPERIMENTAL RESEARCH ON POWER DISTRIBUTION IN TRACTOR MOVEMENT ON DIFFERENT SUPPORTING SURFACES

2019 ◽  
Vol 5 (2) ◽  
pp. 149-153
Author(s):  
V.M. Tretiak ◽  
R.V. Oliadnichuk ◽  
V.V. Kravchenko ◽  
Y.O. Kovalchuk ◽  
M.K. Tretiak
Keyword(s):  
Experimental Research ◽  
Power Distribution
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