Numerical Simulation of Wind Pressure Coefficient and Distribution Trend of the Dust Concentration for Parabolic Trough Solar Collector

Analysis the influence rule of the changing wind angles on the distribution of the pressure coefficient at windward and lee side of collector, and adding the dust particles phase at the completion of the ideal air simulation, simulate the changing rule of the volume fraction of dust around the collector as the change of the attack angle. Under the speed of 10m/s, the conclusion of changing wind angles had no effect on the wind pressure coefficient of the value of windward, the maximum value range is 0.6-0.7 and the changing wind angles had a great effect on the wind pressure coefficient of the value of leeward, the minimum value range is -0.35—1.3 and the minimum value is -1.3 at collector angle θ=30°. When different angles, surface of the collector and the flow field around the dust volume fraction changes a lot, the volume fraction of dust is 2.56 times than the dust entrance at collector angle θ=0°; the volume fraction value significantly angle θ=±60°, its valume fraction is 1.4 times than dust entrance; in the rest of the angles, the volume fraction of collector surface is not much change, only slightly than the exit.