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The Design of Testing Wind Tunnel and Sensor of CLWC

Author: TangXiaoWei
Tutor: GuoYeCai；LiuQing
School: Nanjing University of Information Engineering
Course: Signal and Information Processing
Keywords: Cloud water content Cloud water content sensor Wind Tunnel Finite element analysis Microelectromechanical systems
CLC: P412
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 0
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Abstract


Cloud water content and cloud in the air distribution potential and precipitation processes are closely related to the weather, cloud water content measurements to improve weather forecasting and disaster early warning capabilities of significance. Cloud water content sensor can be used to test weather radar and satellite measurements of cloud water content accuracy, help to improve weather radar and satellite measurements of cloud water content capacity. However, lack of domestic numerical model of the sensor itself, and cloud water content test wind tunnel research provides an experimental platform for cloud water content sensor to provide accurate meteorological environment, cloud water content sensor calibration development of great significance. First, an overview of common cloud water content measurement methods were described existing optical measurement methods (PMS particle measurement systems), microwave measurement methods (microwave radiometer), hotline measurement methods (hot instrument) measurement principle, application development, and related The verification techniques and problems. Hotline measurement methods based on the water content of the cloud made wind tunnel test requirements. Followed by the cloud water content of the test wind tunnel cloud liquid water content sensor for the overall design of the system concept to the whole set of initial and the final requirements of the description and the circulatory system and open systems proposed each test method and superiority. In order to adapt to the wind tunnel simulation tests to improve the ability of wind interference and reduce the cooling effect of the larger droplets, the design of two new hotline moisture meter. Based on the basic theory of steady-state temperature field by solving the equation of heat conduction to the second category, the third boundary condition loading, using ANSYS finite element software for the new hotline in cloud liquid water content meter under the impact evaporation and wind convection under the action of the temperature distribution simulation, through two new hotline moisture meter numerical analysis, the water content of the new hotline measured results were affected by wind disturbance error is smaller, the measurement accuracy is improved, as well as reduced compared large droplets caused by the cooling effect of the instrument and verify the calculation method and the temperature distribution of hot-wire type moisture meter definition of rationality, can be used in future research and development. Finally, the MEMS-based micro-cloud water content sensor model the finite element analysis, analysis shows that micro-cloud water content sensor, fast response, low power consumption, can be equipped with UAVs, when weather conditions permit under artificial weather experiment. The combination of sensors and unmanned aerial vehicles can greatly reduce the high-end artificial weather equipment system cost.

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CLC: > Astronomy,Earth Sciences > Atmospheric science (meteorology ) > Atmospheric sounding ( meteorological observations ) > Detection techniques and methods
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