Calculation method of target trajectory tracking for wind-driven rainfall

Abstract

The invention discloses a target track tracking calculation method of a wind-driven rain amount, and belongs to the technical field of wind engineering. The calculation method comprises the steps of on a given wind field incoming flow condition, solving a Reynolds average N-S equation to obtain a circle flow field of a building; according to an area to be calculated, establishing a virtual plane, and calculating a sample track end point of a sample track on the area to be calculated or the virtual plane; through a surrogate model method, and according to a sample track starting point and the sample track end point, establishing a function relation formula regarding the coordinate relation of a raindrop starting point and end point; given a raindrop track end point coordinate on the area to be calculated, calculating a raindrop track starting point coordinate; solving a raindrop motion equation to obtain an effective track, and according to the effective track, calculating collection rate distribution in the area to be calculated. According to the target track tracking calculation method of the wind-driven rain amount, accurate calculation of collection rates on the back face, lee side, the boundary and the corner point area of the building is achieved, and compared with an existing method, the needed raindrop track calculation amount is remarkably lowered.

Description

technical field [0001] The invention belongs to the technical field of wind engineering, and in particular relates to a method for tracking and calculating a target trajectory of wind-driven rainfall. Background technique [0002] Wind-driven rain is a hot issue in wind engineering research, and the study of wind-driven rain is of great significance in the fields of construction and transportation. Wind-driven rain will affect the insulation performance of building walls, cause mildew on the wall, and even affect the service life of the wall; wind-driven rain may also affect the operation safety of high-speed trains, airplanes and other vehicles. In order to evaluate the impact of wind-driven rainfall, it is necessary to determine the magnitude of wind-driven rainfall. [0003] At present, quantitative calculation of wind-driven rainfall by numerical simulation method is a research hotspot at home and abroad. Numerical simulation methods of wind-driven rainfall are usually...

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Problems solved by technology

However, due to the complexity of the flow field around the building, the current calculation method of raindrop trajectories cannot directly determine the appropriate initial conditions of raindrops to ensure that the end points of raindrops are located in the boundary and corner areas. Number of raindrop trajectories falling into the region of interest

[0006] From the above analysis, it can be seen that if the current calculation method based on the Euler-Lagrangian model is used to study the collection rate distribution of the side and leeward sides of the building, as well as the boundary and corner areas, it is necessary to calculate a huge amount of raindrop trajectories, and it is difficult to ensure the collection rate. Accuracy of Rate Calculations

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