中国物理B ›› 1999, Vol. 8 ›› Issue (1): 27-31.doi: 10.1088/1004-423X/8/1/005

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

ACOUSTIC INVERSE METHOD FOR MEASURING THE SIZE-DISTRIBUTION OF THE DROPS AND THE MOISTURE CONTENT IN WATER (CLOUD) FOG

钱祖文, 邵道远, 李贤徽, 汪德昭   

  1. National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:1998-04-27 修回日期:1998-06-11 出版日期:1999-01-20 发布日期:1999-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.19674062).

ACOUSTIC INVERSE METHOD FOR MEASURING THE SIZE-DISTRIBUTION OF THE DROPS AND THE MOISTURE CONTENT IN WATER (CLOUD) FOG

Qian Zu-wen (钱祖文), Shao Dao-yuan (邵道远), Li Xian-hui (李贤徽), Wang De-zhao (汪德昭)   

  1. National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:1998-04-27 Revised:1998-06-11 Online:1999-01-20 Published:1999-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.19674062).

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摘要： The acoustic-energy loss was measured when the sound wave propagated through a layer of water fog. By the application of the sound attenuation theory in granular media and by means of the acoustic inverse (optimization) method, the size-distribution of the drops and the moisture content in the water fog were measured. It is demonstrated that the sizes of the water drops obey the normal distribution approximately. Comparison of the size-distribution results between data obtained by the inverse measurements and those obtained by the optic-microscopic-size methods shows good agreement with each other. The results of the moisture content and the thickness of the fog layers obtained by this method are also consistent with the results measured by other methods (for example, the water-content weight and the direct measurement of layer's thickness by a scale, etc.) reasonably.

Abstract: The acoustic-energy loss was measured when the sound wave propagated through a layer of water fog. By the application of the sound attenuation theory in granular media and by means of the acoustic inverse (optimization) method, the size-distribution of the drops and the moisture content in the water fog were measured. It is demonstrated that the sizes of the water drops obey the normal distribution approximately. Comparison of the size-distribution results between data obtained by the inverse measurements and those obtained by the optic-microscopic-size methods shows good agreement with each other. The results of the moisture content and the thickness of the fog layers obtained by this method are also consistent with the results measured by other methods (for example, the water-content weight and the direct measurement of layer's thickness by a scale, etc.) reasonably.

中图分类号:  (Granular systems)

  • 45.70.-n
42.68.Ge (Effects of clouds and water; ice crystal phenomena) 43.35.Bf (Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in liquids, liquid crystals, suspensions, and emulsions)