Calculation method for maximum height of catalyst diffusion based on optimal number concentration of ice nuclei in cloud

By constructing a comprehensive wind field model and a concentration distribution model, the problem of Gaussian diffusion models neglecting vertical airflow was solved, enabling rapid and accurate calculation of catalyst diffusion height and supporting rapid assessment and real-time judgment of weather modification operations.

CN121766209BActive Publication Date: 2026-05-22NANJING LELEI SOFTWARE TECH CO LTD
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Patent Information

Application Number
CN202610246151.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-02
Publication Date
2026-05-22
Estimated Expiration
2046-03-02

AI Technical Summary

Technical Problem

Existing Gaussian diffusion models neglect vertical airflow dynamics in weather modification operations, resulting in large prediction biases and complex calculations, making it difficult to meet the needs of rapid assessment and real-time judgment.

Method used

A wind field model incorporating the logarithmic distribution of horizontal wind speed and the parabolic distribution of vertical airflow was constructed. The lifting trajectory of the plume centerline was derived. Combined with turbulent diffusion parameters, an analytical model of catalyst concentration distribution in three-dimensional space was established. By solving for the optimal ice nucleus number concentration and the vertical airflow attenuation threshold, the maximum height of catalyst diffusion was calculated.

Benefits of technology

It improves the physical realism and accuracy of catalyst diffusion range prediction, simplifies the calculation process, meets the needs of rapid assessment and real-time judgment in weather modification operations, and provides a scientific and reliable basis for operational parameters.

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Abstract

The present disclosure provides a calculation method based on the maximum height of catalyst diffusion when the optimal number concentration of ice nuclei in the cloud, comprising establishing a diffusion calculation coordinate system; constructing a wind field model describing the distribution of horizontal wind speed and vertical airflow with height, deriving the lifting trajectory of the center line of the smoke plume with the downwind distance; establishing a concentration distribution analytical model describing the three-dimensional space of the catalyst in the coordinate system; simplifying the concentration distribution analytical model, and solving to obtain the predicted height based on the concentration dilution criterion; based on the vertical airflow velocity distribution model in the wind field model and the preset vertical airflow decay threshold, the critical height based on the limit of dynamic lifting ability is solved; taking the minimum value of the predicted height and the critical height as the maximum height of the catalyst diffusion, the method can comprehensively consider the vertical airflow lifting effect, and the calculation is simple and fast, solving the problems of large prediction deviation caused by ignoring the vertical airflow in the existing model and poor practicability caused by complex calculation.
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