A drop-former rainfall simulator was designed and tested. Its novelty is the use of porous pipes instead of capillaries. Compared to rainfall simulators using capillaries, this feature makes easier its building and maintenance. Rainfall intensity can be selected by simply setting the water supply pressure. The rainfall simulator was able to deliver rainfall intensities between 24 and 75 mm/h for a pressure range of 0.25–1.40 bar. As other drop-former rainfall simulators, the rainfall kinetic energy (expressed in J⋅m⁻²⋅mm⁻¹) and drop size do not depend on the rainfall intensity. Tested on a 0.25 m² area, larger format could be build.

中文翻译：

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一种使用多孔管作为滴落成型器的降雨模拟器

设计并测试了滴落式降雨模拟器。它的新颖之处在于使用多孔管代替毛细管。与使用毛细管的降雨模拟器相比，此功能使其更易于构建和维护。只需设置供水压力即可选择降雨强度。降雨模拟器能够在0.25-1.40 bar的压力范围内提供24至75 mm / h的降雨强度。与其他降落形式的降雨模拟器一样，降雨动能（以J⋅m ^- 2⋅mm ^-1表示）和水滴大小与降雨强度无关。在0.25 m ^2的面积上进行测试，可以制作更大的画幅。