Investigation of the heat exchange in solutions boiling in a vertical tube under forced motion conditions

1967 ◽  
Vol 3 (12) ◽  
pp. 947-950
Author(s):  
L. A. Leont'eva ◽  
V. Ya. Gal'tsov
Keyword(s):  
Heat Exchange ◽  
Vertical Tube ◽  
Forced Motion

An investigation of heat exchange of liquid metal during flow in a vertical tube with non-uniform heating in the transverse magnetic field

2013 ◽  
Vol 60 (5) ◽  
pp. 355-362 ◽  
Author(s):  
I. A. Mel’nikov ◽  
N. G. Razuvanov ◽  
V. G. Sviridov ◽  
E. V. Sviridov ◽  
A. A. Shestakov
Keyword(s):  
Magnetic Field ◽  
Heat Exchange ◽  
Liquid Metal ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Vertical Tube ◽  
Uniform Heating

Numerical Study of Heat Transfer of RP-3 at Supercritical Pressure

2013 ◽  
Vol 663 ◽  
pp. 470-476 ◽  
Author(s):  
Yu Zhou Ren ◽  
Jian Qin Zhu ◽  
Hong Wu Deng
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Numerical Study ◽  
Physical Property ◽  
Vertical Tube ◽  
Supercritical Pressure ◽  
Fluid Temperature ◽  
Extended Corresponding States ◽  
Flow Heat ◽  
Surrogate Fuel

A kind of surrogate fuel which composed of 53% (mole fraction) n-undecane, 18% 1-butylcyclohexane and 29% 1,3,5-trimethyl-benzene was proposed through the analysis of specific composition of aviation kerosene RP-3 and with the method of averaging molecular weight. Taking advantages of the principle of the extended corresponding states and fundamental thermodynamic relationships, thermophysical and transport properties of surrogate fuel were calculated, and verified by contrast with RP-3 experimental data. Finally, numerical study was conducted aiming at RP-3 flow heat transfer characteristics in the vertical tube, which revealed the typical heat exchange characteristics of RP-3 flow heat exchange at supercritical pressure, that is, heat transfer is significantly enhanced due to violent changes of physical property when the fluid temperature is near pseudo-critical temperature, and the effect of buoyancy and turbulent kinetic energy on heat transfer was analyzed.

scholarly journals TESTS OF FLAT HYDROTURBINE ROTATING A HEAT EXCHANGE TUBE

2020 ◽  
Vol 2020 (1) ◽  
pp. 11-12
Author(s):  
Aleksey Bal'chugov ◽  
Borislav Kustov ◽  
Natal'ya Kustova
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Rotational Speed ◽  
Hydraulic Turbine ◽  
Vertical Tube ◽  
Heat Transfer Tube ◽  
Laboratory Bench ◽  
Transfer Tube ◽  
Heat Exchange Tube

Tests of a flat-blade hydraulic turbine designed to rotate a heat transfer tube at a laboratory bench have been performed. The dependence of the rotational speed of a hydraulic turbine in a vertical tube on the flow of water is determined.

Microstructure in soft magnetic E3 (S1, Al) (Sendust) alloys

1988 ◽  
Vol 46 ◽  
pp. 770-771
Author(s):  
June D. Kim
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Ternary Phase Diagram ◽  
Vertical Tube ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Soft Magnetic ◽  
Quenching Temperature ◽  
Thin Foils ◽  
Vertical Tube Furnace

Iron-base alloys containing 8-11 wt.% Si, 4-8 wt.% Al, known as “Sendust” alloys, show excellent soft magnetic properties. These magnetic properties are strongly dependent on heat treatment conditions, especially on the quenching temperature following annealing. But little has been known about the microstructure and the Fe-Si-Al ternary phase diagram has not been established. In the present investigation, transmission electron microscopy (TEM) has been used to study the microstructure in a Sendust alloy as a function of temperature.An Fe-9.34 wt.% Si-5.34 wt.% Al (approximately Fe3Si0.6Al0.4) alloy was prepared by vacuum induction melting, and homogenized at 1,200°C for 5 hrs. Specimens were heat-treated in a vertical tube furnace in air, and the temperature was controlled to an accuracy of ±2°C. Thin foils for TEM observation were prepared by jet polishing using a mixture of perchloric acid 15% and acetic acid 85% at 10V and ∼13°C. Electron microscopy was performed using a Philips EM 301 microscope.

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