Advances in Earth Science ›› 2016, Vol. 31 ›› Issue (8): 820-828. doi: 10.11867/j.issn.1001-8166.2016.08.0820.

• Orginal Article • Previous Articles     Next Articles

Research on Spatial Uniformity of Rainfall Generator

Bo Liu 1( ), Xiaolei Wang 1( ), Zhaojing Kang 1, Teng Su 2, Dongli Zhai 3, Jing Yuan 3   

  1. 1. College of Meteorology and Oceanography,PLA University of Science and Technology, Nanjing 211101,China
    2.Jiuquan Satellite Launch Center,Jiuquan 732750,China
    3.Taiyuan Aero-Instruments Co., Ltd of Nanjing Branch,Nanjing 211106,China
  • Received:2016-05-08 Revised:2016-07-10 Online:2016-08-20 Published:2016-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China “Measuring instrument for the transient micro-physically characteristics of precipitation” (No.41327003) and “Inversion of regional precipitation by microwave links”(No.41475020)

Bo Liu, Xiaolei Wang, Zhaojing Kang, Teng Su, Dongli Zhai, Jing Yuan. Research on Spatial Uniformity of Rainfall Generator[J]. Advances in Earth Science, 2016, 31(8): 820-828.

In order to improve the spatial uniformity of rainfall generator to natural rainfall uniformity, according to the rotation of the test platform, a rotary test platform was designed and developed, and the slip-ring was used to solve the problem of signal transmission in the process of the rotation. Besides, the relationship between rotational speed and spatial uniformity of rainfall generator was established. The results of tipping-bucket rain gauge tested in rainfall field and flow type rainfall intensity standard device testing demonstrated that rainfall generator as the rainfall accumulation and rainfall intensity of the test environment was feasible. Results showed that with the increase of the rotate speed, spatial uniformity first increased, and then decreases, and with the decrease of the test area, different speed presented different trends. When the rotational speed was 1 RPM, test area was 1.6 m×1.6 m and 1.2 m×1.2 m, its uniformity of rainfall generator reached maximum which was bigger than 95%; with the increase of the rotate speed, tipping-bucket rain gauge of RA and RI were of good consistency under the RPM 1 and RPM 2 and the RA maximum deviation reached minimum, 0.2 mm; the average of RA under flow type rainfall intensity standard device test consisted well with rotating test platform at speed RPM 1 and 2, which illustrated the rotary testing platform was consistent with the flow type rainfall intensity standard device. It showed that the method to improve the space uniformity of rainfall generator is feasible and it could find the dynamic difference of RA.

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