scholarly journals Prospects of Using Steel Pistons in Transport Diesel Engines

2019 ◽  
Vol 48 (2) ◽  
pp. 196-202
Author(s):  
Fedor I. Abramchuk ◽  
Andrey N. Avramenko
Keyword(s):  
Heat Conduction ◽  
Boundary Conditions ◽  
Aluminium Alloy ◽  
Heat Conduction Problem ◽  
Radial Deformation ◽  
Thin Wall ◽  
Ring Groove ◽  
Jet Cooling ◽  
Steel Piston ◽  
Oil Jet

The results of comparative design research in the thermal stress and strain state of the piston in transport diesel engine 2 F 10.5/12 are given for its rated power operation. The standard piston is made of an aluminium alloy, and the modernized one, of steel. Piston thermal profiling and indicator test results were used for identifying the mathematical models and refining the boundary conditions for mechanics and heat conduction problems. To ensure reliable heat rejection from the piston, the paper considered the case of oil jet cooling. This was taken into account when describing the boundary conditions of the heat conduction problem. The thin-wall steel piston with oil jet cooling was shown to function reliably under the study conditions. The temperature in the first compression ring groove does not exceed 200 °С, and the radial deformation of the piston crown is less than half of that of an aluminium alloy standard piston.

scholarly journals A Recursive Estimate of Transitional Boundary Conditions in Heat Conduction Problem

1998 ◽  
Vol 1 ◽  
pp. 83-90
Author(s):  
Katsuyuki NIIMI ◽  
Makoto SUZUKI ◽  
Minoru UEDA ◽  
Masatoshi SATO
Keyword(s):  
Heat Conduction ◽  
Boundary Conditions ◽  
Heat Conduction Problem ◽  
Recursive Estimate

scholarly journals Complete Solution For The Time Fractional Diffusion Problem With Mixed Boundary Conditions by Operational Method

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
A. Aghili
Keyword(s):  
Heat Conduction ◽  
Boundary Conditions ◽  
Mixed Boundary ◽  
Heat Conduction Problem ◽  
Complete Solution ◽  
Mixed Boundary Conditions ◽  
Fractional Diffusion ◽  
Diffusion Problem ◽  
Two Dimensions ◽  
Operational Method

AbstractIn this study, we present some new results for the time fractional mixed boundary value problems. We consider a generalization of the Heat - conduction problem in two dimensions that arises during the manufacturing of p - n junctions. Constructive examples are also provided throughout the paper. The main purpose of this article is to present mathematical results that are useful to researchers in a variety of fields.

ADDITIONAL SOUGHT-FOR FUNCTIONS AND LOCAL COORDINATE SYSTEMS APPLIED IN THE HEAT CONDUCTIVITY PROBLEMS FOR MULTILAYERED BUILDING STRUCTURES

2018 ◽  
Vol 8 (3) ◽  
pp. 29-32
Author(s):  
Ol’ga Yu. KURGANOVA
Keyword(s):  
Heat Conduction ◽  
Boundary Conditions ◽  
Heat Balance ◽  
Integral Method ◽  
Approximate Analytical Solution ◽  
Heat Conduction Problem ◽  
Erential Equation ◽  
Building Structures ◽  
Coordinate Systems ◽  
Partial Diff

The solution problems of the additional the sought-for function and additional boundary conditions based when using local coordinate systems, an approximate analytical solution of the heat conduction problem for a double-layer plate is obtained for symmetric boundary conditions of the fi rst kind. The use of the additional sought-for function in the integral method of heat balance makes it possible to reduce the solution of the partial diff erential equation to the integration of an ordinary diff erential equation.

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