Application of Boundary-Layer Theory in Turbomachinery

1959 ◽  
Vol 81 (4) ◽  
pp. 543-551 ◽  
Author(s):  
H. Schlichting
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Boundary Layer Theory ◽  
New Approach

Some of the results of a new approach to a theoretical and experimental study of flows through cascades.

scholarly journals Evaluation of the Search and Rescue Leeway model into the Tyrrhenian sea: a new point of view

2016 ◽  
Author(s):  
Antonia Di Maio ◽  
Mathew Vayalumkal Martin ◽  
Roberto Sorgente
Keyword(s):  
Boundary Layer ◽  
Regional Model ◽  
Boundary Layer Theory ◽  
Point Of View ◽  
Search And Rescue ◽  
Sea Surface ◽  
Tyrrhenian Sea ◽  
New Approach ◽  
Search Area ◽  
Floating Objects

Abstract. The trajectories prediction of the floating objects above the sea surface represents an important task in the search and rescue (SAR) operations. In this paper we show how may be possible estimate the most probable search area by means of a stocastic model, schematizing appropriately the shape of the object and evaluating the forces acting on it. The LEEWAY model, a Montecarlo-based ensemble trajectory model, has been used; here not only the statistical law to calculate the leeway is employed but also an almost deterministic law inspired by the boundary layer theory. The model is nested with the sub-regional hydrodynamic model TSCRM (Thyrrenian Sicily Channel Regional Model) developed in the framework of PON-TESSA (National Operative Programs-TEchnology for the Situational Sea Awareness) project. The principal objective of the work is to validate the new approach of leeway calculation relying on a real event of Person in Water (PIW), occurred on July 2013 in the Thyrrenian Sea. The results show that assimilating a human body to a cylinder and estimating either the transition from laminar to turbulent boundary layer and the drag coefficients, may be possible to solve a forces balance equation which permits to estimate with good approximation the search area. This new point of view leads to the possibility to check the same approach also on other different categories of targets, so as to overcome in the future the limitations associated with calculation of leeway by means of the standard statistical law.

scholarly journals UNSTEADY FRICTION AND HEAT TRANSFER IN THE INITIAL PIPELINE SECTION AT THE RESET OF THERMAL LOAD

2018 ◽  
Vol 20 (5-6) ◽  
pp. 22-28
Author(s):  
K. H. Gilfanov ◽  
N. D. Yakimov ◽  
N. Y. Minvaleev ◽  
E. G. Sheshukov ◽  
N. W. Bogdanova
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Experimental Study ◽  
Thermal Load ◽  
Gas Flow ◽  
Cylindrical Channel ◽  
Thermal Characteristics ◽  
Boundary Layer Theory ◽  
Wall Friction ◽  
High Temperature Gas

The results of numerical and experimental study of wall friction and heat transfer in a short cylindrical channel are presented. Hydrodynamic and thermal characteristics of nonstationary high-temperature gas flow are determined. The results are summarized in the framework of boundary layer theory.

INVERSE PROBLEMS OF BOUNDARY LAYER THEORY

2018 ◽  
Vol 49 (8) ◽  
pp. 793-807
Author(s):  
Vladimir Efimovich Kovalev
Keyword(s):  
Boundary Layer ◽  
Inverse Problems ◽  
Boundary Layer Theory
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