scholarly journals NUMERICAL SIMULATION OF A DOUBLE SKIN WITH SECONDARY VENTILATION FLOW ON ADIABATIC WALL

2017 ◽  
Vol 8 ◽  
Author(s):  
M.S. Rouabah ◽  
M. Bouraoui ◽  
A. Abidi-Saad ◽  
A. Korichi ◽  
C. Popa ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Adiabatic Wall ◽  
Double Skin

A Method of Solving Three Temperature Problem of Turbine With Adiabatic Wall Temperature

2021 ◽  
Author(s):  
Zeyu Wu ◽  
Xiang Luo ◽  
Jianqin Zhu ◽  
Zhe Zhang ◽  
Jiahua Liu
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Reynolds Number ◽  
Wall Temperature ◽  
Reference Temperature ◽  
Inlet Temperature ◽  
Adiabatic Wall ◽  
Rotating Cavity ◽  
Temperature Problem ◽  
Turbulence Parameters

Abstract The aeroengine turbine cavity with pre-swirl structure makes the turbine component obtain better cooling effect, but the complex design of inlet and outlet makes it difficult to determine the heat transfer reference temperature of turbine disk. For the pre-swirl structure with two air intakes, the driving temperature difference of heat transfer between disk and cooling air cannot be determined either in theory or in test, which is usually called three-temperature problem. In this paper, the three-temperature problem of a rotating cavity with two cross inlets are studied by means of experiment and numerical simulation. By substituting the adiabatic wall temperature for the inlet temperature and summarizing its variation law, the problem of selecting the reference temperature of the multi-inlet cavity can be solved. The results show that the distribution of the adiabatic wall temperature is divided into the high jet area and the low inflow area, which are mainly affected by the turbulence parameters λT, the rotating Reynolds number Reω, the high inlet temperature Tf,H* and the low radius inlet temperature Tf,L* of the inflow, while the partition position rd can be considered only related to the turbulence parameters λT and the rotating Reynolds number Reω of the inflow. In this paper, based on the analysis of the numerical simulation results, the calculation formulas of the partition position rd and the adiabatic wall temperature distribution are obtained. The results show that the method of experiment combined with adiabatic wall temperature zone simulation can effectively solve the three-temperature problem of rotating cavity.

Numerical simulation of dynamical aspects of natural convection flow in a double-skin façade

2012 ◽  
Vol 50 ◽  
pp. 229-233 ◽  
Author(s):  
Catalin Popa ◽  
Dan Ospir ◽  
Stéphane Fohanno ◽  
Cristian Chereches
Keyword(s):  
Numerical Simulation ◽  
Natural Convection ◽  
Convection Flow ◽  
Natural Convection Flow ◽  
Double Skin

Improvement of the Double Skin Facades

2015 ◽  
Vol 725-726 ◽  
pp. 41-48 ◽  
Author(s):  
Mikhail Petrichenko ◽  
Nikolai Vatin ◽  
Darya Nemova
Keyword(s):  
Numerical Simulation ◽  
Theoretical Calculations ◽  
Double Skin ◽  
Double Skin Facades ◽  
New Buildings

Double skin facades very popular in this time. They are applied for construction of new buildings and for reconstruction. But double skin facades contains some defects. In the present paper concrete constructive changes in a design of the Double skin facades which are offered. This changes will can to normalize heatmoisture conditions in the building. All proposed solutions are proved by theoretical calculations and numerical simulation.

scholarly journals Numerical Simulation Investigation of a Double Skin Transpired Solar Air Collector

2022 ◽  
Vol 12 (1) ◽  
pp. 520
Author(s):  
Charles Berville ◽  
Florin Bode ◽  
Cristiana Croitoru
Keyword(s):  
Numerical Simulation ◽  
Solar Collector ◽  
Ambient Air ◽  
Point Of View ◽  
Airflow Rate ◽  
Solar Collectors ◽  
A Value ◽  
Double Skin ◽  
Separation Plate ◽  
Guide Values

Transpired solar collectors (TSC) are one of the most popular solar thermal technologies for building façades. TSC use solar energy to heat the absorber surface, which transmits thermal energy to the ambient air. A variant of TSC, namely, a double skin transpired solar collector (DSTSC), has been analyzed in this paper, thus providing guide values and a technical point of view for engineers, architects, and constructors when designing such transpired solar collectors. Three important parameters were addressed in this study through numerical simulation: the influence of a separation plate introduced in a TSC, turning it into a DSTSC; the air layer thickness influence on the performance of the collector; and the influence of the used absorber materials for the separation plate material. Greater heat exchange efficiency was noticed for the DSTSC at every imposed airflow rate compared with the TSC. Regarding the thickness of the collector, the efficiency gradually increased when increasing the solar collector thickness until it reached a value of 20 cm, though not varying significantly at a thickness of 30 cm.

Numerical simulation study of BIPV/T double-skin facade for various climate zones in Australia: Effects on indoor thermal comfort

2018 ◽  
Vol 12 (1) ◽  
pp. 51-67 ◽  
Author(s):  
Siliang Yang ◽  
Alessandro Cannavale ◽  
Deo Prasad ◽  
Alistair Sproul ◽  
Francesco Fiorito
Keyword(s):  
Numerical Simulation ◽  
Thermal Comfort ◽  
Simulation Study ◽  
Climate Zones ◽  
Indoor Thermal Comfort ◽  
Double Skin
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