For the pentagonal heliostat driven by a dual linear-arm drive
a model of a regular pentagonal heliostat with an area of 48.5 m² was constructed
and numerical simulations were conducted using the SST k-ω turbulence model. The primary objective of the study was to evaluate the surface wind pressure and surrounding flow field characteristics
as well as to analyze the drag coefficient and pressure distribution at different elevation angles. Additionally
the impact of wind pressure on mirror deformation was examined using a static structural analysis module. The simulation results indicated that the drag coefficient gradually increases with the elevation angle
reaching a maximum value of 1.28. Furthermore
the structure-flow coupling analysis revealed that the deformation of the mirror reaches its maximum at an elevation angle of 90°
with a deformation value of 6.24 mm
and the maximum deformation occurs at the sharp corner above the heliostat.
关键词
Keywords
references
EMES M J, ARJOMANDI M, GHANADI F, et al.Effect of turbulence characteristics in the atmospheric surface layer on the peak wind loads on heliostats in stow position[J]. Solar energy, 2017, 157: 284-297.
MAMMAR M, DJOUIMAA S, GÄRTNER U, et al. Wind loads on heliostats of various column heights: an experimental study[J]. Energy, 2018, 143: 867-880.
JAFARI A, EMES M, CAZZOLATO B, et al.Turbulence characteristics in the wake of a heliostat in an atmospheric boundary layer flow[J]. Physics of fluids, 2020, 32(4): 045116.
FADLALLAH S O, ANDERSON T N, NATES R J.Fluid-structure interaction analysis of a lightweight sandwich composite structure for solar central receiver heliostats[J]. Mechanics based design of structures and machines, 2023, 51(10): 5737-5766.
BELAID A, FILALI A, GAMA A, et al.Design optimization of a solar tower power plant heliostat field by considering different heliostat shapes[J]. International journal of energy research, 2020, 44(14): 11524-11541.
BLUME K, RÖGER M, PITZ-PAAL R. Full-scale investigation of heliostat aerodynamics through wind and pressure measurements at a pentagonal heliostat[J]. Solar energy, 2023, 251: 337-349.