scholarly journals Numerical Study on Combustion and Heat Transfer Properties Under Oxy-fuel Condition in a 600MW Utility Boiler

2017 ◽  
Vol 105 ◽  
pp. 4009-4014 ◽  
Author(s):  
Debo Li ◽  
Xuan Liu ◽  
Chang’an Wang ◽  
Kai Xu ◽  
Qiongliang Zha ◽  
...  
2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Yunfei Xing ◽  
Fengquan Zhong ◽  
Xinyu Zhang

In the present paper, numerical study of flow and heat transfer properties of RP-3 kerosene at liquid and supercritical conditions in an impingement model is conducted with renormalization group (RNG) k−ε turbulence model and a ten-species surrogate of kerosene. The independence of grids is first studied, and the numerical results are compared with experimental data for validation. Characteristics of flow and heat transfer of kerosene flow in the impingement model are studied with different inlet mass flow rates and different inlet temperatures. The velocity and temperature field show similar profile compared to that of air impingement. The heat transfer rates increase first with the increasing of inlet temperature and then decrease suddenly when the inlet temperature is 500 K.


2018 ◽  
Vol 96 (12) ◽  
pp. 1420-1430 ◽  
Author(s):  
Tanzila Hayat ◽  
S. Nadeem

The present study examines the comparison of heat transfer properties of magnetohydrodynamic (MHD) rotating traditional nanofluid with that of developing hybrid nanofluid. A new kind of standard fluid, “hybrid nanofluid” is used to improve heat transfer in boundary layer flow. Silver (Ag) and copper oxide (CuO) nano-size particles are considered to constitute our desired hybrid nanofluid. The rotation of nanofluid is accomplished about the vertical axis so that “angular velocity”, ω∗, is constant. The system of nonlinear and coupled ordinary differential equations is handled using numerical approach BVP-4C with shooting procedure. From the present research, it is noticed that, even in the presence of magnetic field, the rate of heat transfer of hybrid nanofluid (Ag–CuO/water) is higher than that of ordinary nanofluid (CuO/water). In hybrid nanofluid, the required rate of heat transfer can be accomplished by picking distinctive and suitable nanoparticle extents.


2015 ◽  
Vol 9 (3) ◽  
pp. 242 ◽  
Author(s):  
Efstathios Kaloudis ◽  
Dimitris Siachos ◽  
Konstantinos Stefanos Nikas

Author(s):  
Nadia Dihmani ◽  
Ahmed Mezrhab ◽  
Larbi Elfarh ◽  
Hicham Bouali ◽  
Hassan Naji

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