Numerical Simulations and Research of Heat Transfer in Pneumatic Pulsator
-
Jacek Wernik
und
Krzysztof J. Wolosz
Abstract
In loose material beds above silo outlets or in vertical channels immovable vaults can occur limiting or making impossible the downward movement of the loose material. To prevent vault creation or to destroy vault by aeration and separation of the loose material from encasing walls, a pneumatic pulsator can be applied. In order to optimize the head design, the flow phenomena were numerically simulated and the channels were preliminarily designed. The data obtained from simulation were also used as a basis for setting up an experimental stand to validate simulation results. During air flow in the channels due to frictional heat is produced, which is discharged from the pulsator to the environment. To increase the heat transfer in pneumatic pulsator, the external surfaces of channel are finned. Numerical simulations carried out conduction and convection heat transfer in the fins, and the results illustrated the temperature distribution on the surface of the body, the temperature distribution in the fins, stress distribution, value of factor of safety, the static displacement of the body and the distribution of air temperature along with the speed vectors. The results were compared with experimental and analytical results that confirm their correctness. The results confirm the rational design of the body in terms of thermal. The obtained temperature distribution using CFD agrees approximately with the values measured during the tests.
Acknowledgement
The authors acknowledge the Polish Ministry of Science and Higher Education and National Centre for Research and Development for financial support in the Technological Initiative I program.
References
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©2015 by De Gruyter
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Artikel in diesem Heft
- Frontmatter
- Study on the Complex Neuron Model’s Reduction and Its Dynamic Characteristics
- Collocation Method for the Modeling of Membrane Gas Permeation Systems
- Three-Dimensional Flow Optimization of a Nozzle with a Continuous Adjoint
- Numerical Simulations and Research of Heat Transfer in Pneumatic Pulsator
- Numerical Solution of MHD Stagnation Point Flow of Williamson Fluid Model over a Stretching Cylinder
- Experimental and Numerical Analysis of Qinling Mountain Engineered Rocks during Pulse-Shaped SHPB Test
- Numerical Study of Free Convection in a Doubly Stratified Non-Darcy Porous Medium Using Spectral Quasilinearization Method
- Existence and Exponential Stability of the Unique Almost Periodic Positive Solution for Discrete Nicholson’s Blowflies Model
- Conservation Laws and Exact Solutions with Symmetry Reduction of Nonlinear Reaction Diffusion Equations
