The interaction mechanism between sand particles and the bed surface in aeolian sand flow consti-tutes a key issue in aeolian physics research.Owing to the complexity of sand particle movement,the research re-sults from numerical simulation typically deviate significantly from the actual situation.Consequently,the splash functions obtained through experimental means holds great significance for understanding the physical process of particle-bed collision.Based on the consensus that the influence of airflow in saturated aeolian sand flow on the collision process can be neglected,scholars conduct splash functions research by means of a large number of windless collision experiments.However,due to limitations in measurement technology,there are scarce mea-sured data of the particle-bed collision process under the typical impact angle of 10°.Considering that both nu-merical simulation and windless collision experiments indicate that the splash functions are sensitive to the im-pact angle,a large number of particle-bed collision processes with an impact angle around 10° on the surface of a loose sand bed are obtained in a wind tunnel by utilizing high-speed photography technology.Combined with the experimental results of predecessors'sand grain centrifugal launcher(with an impact angle ranging from 20° to 50°),the splash functions covering a wide range of impact angles are constructed.These functions can be ap-plied to the wind tunnel experiment results of predecessors under different experimental conditions,which is of great significance for future research in aeolian physics.
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