scholarly journals THE RECALCULATING TECHNIQUE THE HEAT-HYDRAULIC CHARACTERISTICS OF DIRECT-FLOW CYLINDRICAL STEAM GENERATORS OPERATING ON A FREON COOLANT, WITH THE BOUNDARY CONDITIONS OF THE SECOND KIND FOR THE BOUNDARY CONDITIONS OF THE FIRST KIND

2019 ◽  
Vol 27 (5) ◽  
pp. 84
Author(s):  
Anatoly P. Lukisha
Keyword(s):  
Boundary Conditions ◽  
Hydraulic Characteristics ◽  
Steam Generators ◽  
Direct Flow

scholarly journals Experimental investigation of thermal-hydraulic characteristics of direct-flow honeycomb seal at the injection of cooling air.

2015 ◽  
Vol 2015 (3) ◽  
pp. 62-71
Author(s):  
Максим Шилин ◽  
Maksim Shilin ◽  
Виктор Перевезенцев ◽  
Viktor Perevezentsev ◽  
Игорь Усачев ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Flow Resistance ◽  
Honeycomb Structure ◽  
Geometrical Parameters ◽  
Hydraulic Characteristics ◽  
Direct Flow ◽  
Honeycomb Seal ◽  
Honeycomb Seals ◽  
Cooling Air ◽  
The Relationship

Experimentally studied the influence of operational and geometrical parameters on flow resistance and heat transfer in honeycomb seals. The relationship between the nature of changes in the degree of intensification of hydraulic resistance, heat and vortex structure in the space of the cell. The effect of blowing cooling air through the surface of the honeycomb structure on the thermal hydraulic characteristics of the seal.

Reflux Condensation and Transition to Natural Circulation in a Vertical U-Tube

1983 ◽  
Vol 105 (4) ◽  
pp. 719-727 ◽  
Author(s):  
S. Banerjee ◽  
J-S. Chang ◽  
R. Girard ◽  
V. S. Krishnan
Keyword(s):  
Boundary Conditions ◽  
Flow Rate ◽  
Pressure Difference ◽  
Natural Circulation ◽  
Heat Removal ◽  
Liquid Column ◽  
Steam Flow ◽  
Steam Generators ◽  
Cooling Jacket ◽  
Over The Top

Reflux and natural circulation condensation in vertical inverted U-tube steam generators form an important heat removal mechanism for nuclear reactors in certain accidents. As a first step in understanding the behavior of such steam generators, condensation was studied in a single vertical tube with a cooling jacket. Steam was fed into the tube from an inlet plenum and condensed in the jacketed region. The inlet and outlet pressures and cooling jacket conditions were controlled to give well-defined boundary conditions. The amount of steam condensed and the flow patterns obtained were determined. The steam flow rate into the tube initially increased with pressure differences between the inlet and outlet plenums. The condensate ran back to the inlet plenum countercurrent to the steam flow (reflux flow). At a certain pressure difference, no further increase in steam inlet flow rate was observed though pure refluxing was maintained. Instead, a column of liquid formed above the two-phase condensing region. The length of this column increased as the pressure difference was increased. At a sufficiently large pressure difference the liquid column carried over the top of the vertical U-bend and there was a dramatic change in flow regime to natural circulation condensation in which the bulk of the condensate flowed cocurrently with the steam. The behavior of the system was explained by postulating that “flooding” conditions were reached at the inlet when the pressure difference became large enough for a liquid column to form above the condensing region. A small perturbation analysis of the stability of the condensing and liquid column regions was done using a lumped parameter approach and constant pressure boundary conditions. Experimental results on the frequency of oscillations in a single tube followed the qualitative trends predicted by the linear analysis, but the predicted frequencies were about twice as high as those observed.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

A digital vocal tract simulator with boundary conditions at lips and glottis

1981 ◽  
Vol 64 (11) ◽  
pp. 18-26 ◽  
Author(s):  
Tetsuya Nomura ◽  
Nobuhiro Miki ◽  
Nobuo Nagai
Keyword(s):  
Boundary Conditions ◽  
Vocal Tract

Exploring the affective impact, boundary conditions, and antecedents of leader humility.

2018 ◽  
Vol 103 (9) ◽  
pp. 1019-1038 ◽  
Author(s):  
Lin Wang ◽  
Bradley P. Owens ◽  
Junchao (Jason) Li ◽  
Lihua Shi
Keyword(s):  
Boundary Conditions ◽  
Affective Impact ◽  
Leader Humility

Exploring personality variables as boundary conditions of the justice-job satisfaction relationship

2009 ◽  
Author(s):  
Sabrina Volpone ◽  
Cristina Rubino ◽  
Ari A. Malka ◽  
Christiane Spitzmueller ◽  
Lindsay Brown
Keyword(s):  
Job Satisfaction ◽  
Boundary Conditions ◽  
Personality Variables ◽  
Satisfaction Relationship
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