对流式湍流模拟装置湍流模拟稳定性研究

倪小龙; 宋卢军; 姜会林; 付强; 刘艺; 张肃; 刘智

doi:doi:10.3788/lop52.100102

激光与光电子学进展, 2015, 52 (10): 100102, 网络出版: 2015-10-08

对流式湍流模拟装置湍流模拟稳定性研究下载： 597次

Research on Turbulence Stability Characteristic of Convection Turbulence Simulator

论文大纲

倪小龙 ^1,2,*宋卢军 ^1,3姜会林 ¹付强 ¹刘艺 ^1,3张肃 ¹刘智 ^1,2

作者单位

¹ 长春理工大学空地激光通信技术国防重点学科实验室, 吉林长春 130022

² 长春理工大学光电工程学院, 吉林长春 130022

³ 长春理工大学电子信息工程学院, 吉林长春 130022

大气光学湍流模拟稳定性对流式湍流模拟装置 atmospheric optics turbulence simulate stability convection turbulence simulator

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摘要

为评价对流式湍流模拟装置的性能，验证所模拟湍流的稳定性，提高湍流模拟器装置的可信度，从区域稳定性、频谱稳定性以及不同波长条件下大气相干长度的变化情况3 个方面进行了详细的检测与分析。在不同位置选取21 个点进行独立测量，对模拟装置的光强闪烁与角起伏区域稳定性进行了检测与评价。采用532、808、1064、1550 nm4 种波长激光器与检测装置，以大气相干长度作为检测指标对模拟装置所模拟湍流的大气相干长度随波长的变化情况进行了检测。最后，对测量数据的强度起伏与角起伏进行了频谱分析以评价模拟装置的频谱稳定性。实验结果表明：对流式湍流模拟装置在16 cm×16 cm 区域内的波动量小于15%，不同波长条件下相干长度满足Kolmogrov 理论，频谱波动量小于20%，对大气湍流进行了高精度、高可靠性、高稳定性的模拟。该研究内容为对流式湍流模拟装置的使用提供了有效的依据。

Abstract

In order to evaluate the performance of the convection turbulence simulator, the stability of the simulate turbulence is tested and the credibility of the turbulence simulator is improved. The measurement and analysis are done from three aspects of regional stability, wavelength stability and frequency stability by using specific instrument. 21 points in specific locations are chosen for testing the regional stability of scintillation and angle-of-arrival. By using the coherence length as the indicator, 532 nm, 808 nm, 1064 nm and 1550 nm lasers are used to test the wavelength stability of the convection turbulence simulator. Finally, the spectra of scintillation and angle-of-arrival are analyzed to test the spectral stability of turbulence simulator. The experimental results show that, the performance fluctuation of the convection turbulence simulator in a 16 cm ×16 cm area is less than 15%, the coherence length fluctuation under four wavelengths meets Kolmogrov theory and the spectrum fluctuation is less than 20%. The turbulence simulator can simulate the atmospheric turbulence with high precision, high reliability and high stability. The research provides a strong support for the applications of the convection turbulence simulator.

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倪小龙, 宋卢军, 姜会林, 付强, 刘艺, 张肃, 刘智. 对流式湍流模拟装置湍流模拟稳定性研究[J]. 激光与光电子学进展, 2015, 52(10): 100102. Ni Xiaolong, Song Lujun, Jiang Huilin, Fu Qiang, Liu Yi, Zhang Su, Liu Zhi. Research on Turbulence Stability Characteristic of Convection Turbulence Simulator[J]. Laser & Optoelectronics Progress, 2015, 52(10): 100102.

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