scholarly journals Numerical simulation of heat exchange at cooling of high-temperature metal blank made of steel ChGSN2A

2017 ◽  
Vol 2 (9) ◽  
pp. 3-8 ◽  
Author(s):  
Сергей Макаров ◽  
Sergey Makarov ◽  
Вячеслав Дементьев ◽  
V. Dementiev
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Heat Exchange ◽  
Liquid Medium ◽  
Cooling Medium ◽  
Intensity Changes ◽  
Cooling Intensity ◽  
Motion Speed ◽  
Metal Blank

The results of the numerical simulation of heat exchange at the cooling metal blank made of steel 30ChGSN2A are shown. The velocities of blank cooling with the flow of gas-liquid medium are defined. Cooling intensity changes depending on the blank motion speed opposite the flow of cooling medium are analyzed.

A High-Temperature Assessment of Air-Cooled Unsteady Pressure Transducers

1998 ◽  
Vol 120 (3) ◽  
pp. 608-612 ◽  
Author(s):  
D. G. Ferguson ◽  
P. C. Ivey
Keyword(s):  
High Temperature ◽  
Control Systems ◽  
Thermal Protection ◽  
Transfer Model ◽  
Test Bed ◽  
Cooling Effectiveness ◽  
Pressure Transducers ◽  
Unsteady Pressure ◽  
Cooling Medium ◽  
Source Flow

This paper discusses the problem of measuring unsteady pressure in a high-temperature environment using standard transducers. Commercially available cooling adapters for these transducers use water as the cooling medium to provide thermal protection. This arrangement is suitable only for some test bed applications and not suitable for integration into in-flight active control systems. An assessment of the cooling effectiveness of a commercial water-cooled adapter using air as the cooling medium is presented using an experimentally validated finite element heat transfer model. The assessment indicates survival of an air-cooled transducer, itself rated to 235°C, at source flow temperatures up to 800°C.

Numerical Simulation of Interior Flow in Evaporation Droplet

2014 ◽  
Author(s):  
Qingming Dong ◽  
Zhentao Wang ◽  
Yonghui Zhang ◽  
Junfeng Wang
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Internal Flow ◽  
Surface Force ◽  
Droplet Surface ◽  
Force Model ◽  
Marangoni Flow ◽  
High Temperature Area ◽  
Interior Flow ◽  
Temperature Area

In this present study, the VOF (Volume of Fluid) approach is adopted to capture the interface, and CSF (Continuum Surface Force) model to calculate the surface tension, and the governing equations are founded in numerical simulation of evaporating droplets. In this work, a water droplet is assumed to be suspending in high temperature air, and the gravity of a droplet is ignored. During evaporating process of the droplet, the internal circulation flow will be induced due to the gradient of temperature at the droplet surface. The interface flows from high temperature area to low temperature area, which pulls the liquid to produce convective flow inside the droplet called as Marangoni flow. Marangoni flow makes the temperature distribution tend to uniformity, which enhances heat transfer but weakens Marangoni flow in turn. So, during droplet evaporation, the internal flow is not steady.

scholarly journals CFD analysis for counter flow in concentric tube heat exchangers

2018 ◽  
Vol 7 (2.20) ◽  
pp. 250
Author(s):  
Banoth Mohan ◽  
V Ashok Kumar
Keyword(s):  
Heat Exchange ◽  
Heat Exchangers ◽  
Associate Degree ◽  
Cfd Analysis ◽  
Sensible Heat ◽  
Counter Flow ◽  
Cooling Medium ◽  
In Transit ◽  
Parallel Stream ◽  
Coaxial Tube

A device may be a device worked for the sensible heat exchange beginning with one liquid then onto the attendant, paying very little reference to whether or not the liquids square measure isolates by a powerful divider in order that they ne'er mix, or the liquids square measure particularly in touch. reliably get some data concerning in device progression is creating to form productive, traditionalist and stinting heat exchangers, where for the duration of the planet. Strengthening the function for this alteration wants associate degree association. In most up-to-date 5 years coaxial tube heat exchangers use unnatural convection to cut down the temperature of a operating liquid whereas raising the temperature of the cooling medium. The motivation driving this paper is to utilize ANSYS FLUENT12.1 programming and hand counts to interrupt down the temperature drops as a neighborhood of each straight speed and delta temperature and the way each modification with the opposite. every gleam money dealer show was worked in steps and examined in transit till the purpose that the instant that each parallel stream and counter stream heat money dealer models were created. The outcomes were thought of between every model and among parallel and counter stream with fouled funneling. Turbulent stream was conjointly impecunious down amidst the distinction within the shine exchangers to choose its impact on heat exchange. whereas clearly the fouled heat money dealer had a lower execution and during this manner cooled the operating liquid less, the execution of the counter heat money dealer out of the blue of the parallel heat money dealer.

Sign in / Sign up

Export Citation Format

Share Document