Numerical Simulation of the (Nonlinear) Conduction/Radiation Heat Transfer Process in a Nonconvex and Black Cylindrical Body

In order to study heat transfer process in APU compartment of passenger plane and to perform structure thermal analysis, temperature field of APU compartment has been calculated by numerical computation. The computation model of flow and heat transfer process in APU compartment are setup by commercial CFD software Fluent, Realizable k-ε turbulent model and S2S thermal radiation model are used, and the flow field, temperature and heat flow information are acquired. Radiation heat transfer is the major heat transfer process in APU compartment; APU fireproofing cover and heat insulation hood of exhaust pipe function work as radiation heat shielding screens; and cooling air in the APU fireproofing cover plays an important part in decreasing the temperature of the fireproofing cover; the injection cooling air in the exhaust pipe reduced the wall temperature effectively. The results provide reference to optimization design.

Download Full-text

Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in space power systems

Frontiers in Energy ◽

10.1007/s11708-010-0105-y ◽

2010 ◽

Vol 5 (2) ◽

pp. 166-173 ◽

Cited By ~ 3

Author(s):

Jinying Yin ◽

Linhua Liu

Keyword(s):

Heat Transfer ◽

Power Systems ◽

Phase Change ◽

Transfer Process ◽

Liquid Droplet ◽

Radiation Heat Transfer ◽

Heat Transfer Process ◽

Radiation Heat ◽

Space Power Systems

Download Full-text

Numerical Simulation for Microconvection Around Nano-Particle With Brownian Motion in Liquid

Heat Transfer: Volume 1 ◽

10.1115/ht2003-47347 ◽

2003 ◽

Author(s):

B. X. Wang ◽

H. Li ◽

X. F. Peng ◽

L. X. Yang

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Brownian Motion ◽

Numerical Model ◽

Temperature Gradient ◽

Transfer Process ◽

Heat Transfer Process ◽

Nano Particles ◽

Analytic Method ◽

Nano Particle

The development of a numerical model for analyzing the effect of the nano-particles’ Brownian motion on the heat transfer is described. By using the Maxwell velocity distribution relations to calculate the most possible velocity of fluid molecules at certain temperature gradient location around the nano-particle, the interaction between fluid molecules and one single nano-particle is analyzed and calculated. Based on this, a syntonic system is proposed and the coupled effect that Brownian motion of nano-particles has on fluid molecules is simulated. This is used to formulate a reasonable analytic method, facilitating laboratory study. The results provide the essential features of the heat transfer process, contributed by micro-convection to be considered.

Download Full-text

HEAT EXCHANGE IN A PLANE CHANNEL IN A TURBULENT FLOW REGIME IN THE CASE OF SMALL VALUES OF PRANDTL NUMBER ACCORDING TO DATA OF DIRECT NUMERICAL SIMULATION

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) ◽

10.36807/1998-9849-2020-56-82-57-60 ◽

2021 ◽

Vol 56 ◽

pp. 57-60

Author(s):

Yurii G. Chesnokov ◽

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Prandtl Number ◽

Direct Numerical Simulation ◽

Transfer Process ◽

Peclet Number ◽

Plane Channel ◽

Heat Transfer Process ◽

Flat Channel ◽

Péclet Number

Using the results obtained by the method of direct numerical simulation of the heat transfer process in a flat channel by various authors, it is shown that at small values of Prandtl number quite a few characteristics of the heat transfer process in a flat channel depend not on Reynolds and Prandtl numbers separately, but on Peclet number. Peclet number is calculated from the so-called dynamic speed

Download Full-text