CAJ | 학술논문

选取市场上某品牌虹吸式雨水斗(无集水斗)，通过改变整流罩的有无及排水立管长度(3 m、1.5 m)来组成4种工况条件，分别进行流量与斗前水深试验。对无整流罩试验水面起伏不定的原因进行了简要分析，并通过对比整流罩的有无所对应的流量与斗前水深关系曲线，总结出适当降低整流罩高度，扩大整流罩罩径，可尽早实现整流罩的隔气作用，减小斗前水深，提高雨水斗的排水性能。通过对比3 m 和1.5 m 排水立管时的流量与斗前水深关系曲线和进一步的理论计算，总结出当管内最大负压控制在-1 atm(-101.325 kPa)以内时，排水立管越长，雨水斗的泄流量就越大，管内最大负压也就越大。同时推算出固定长度排水立管内，距离雨水斗出水口越远，压强越大，管道初始端负压最大。
선취시장상모품패홍흡식우수두(무집수두)，통과개변정류조적유무급배수립관장도(3 m、1.5 m)래조성4충공황조건，분별진행류량여두전수심시험。대무정류조시험수면기복불정적원인진행료간요분석，병통과대비정류조적유무소대응적류량여두전수심관계곡선，총결출괄당강저정류조고도，확대정류조조경，가진조실현정류조적격기작용，감소두전수심，제고우수두적배수성능。통과대비3 m 화1.5 m 배수립관시적류량여두전수심관계곡선화진일보적이론계산，총결출당관내최대부압공제재-1 atm(-101.325 kPa)이내시，배수립관월장，우수두적설류량취월대，관내최대부압야취월대。동시추산출고정장도배수립관내，거리우수두출수구월원，압강월대，관도초시단부압최대。
This paper describes a flow versus depth test on a certain brand of siphonic roof out-let without sink under four working conditions with different vertical standpipe length and with or without cover.The reasons for varying water level without cover were analyzed.Based on the com-parison of the flow rates before outlet with and without cover,it was concluded that lowering the anti-vortex cover and extending its diameter appropriately could isolate gas earlier,lower the water level before outlet and improve the drainage performance of roof outlet.Through the comparison of the curves of flow rate-water head relationship between the standpipe of 3 m and 1.5 m as well as further theoretical calculation,it showed that when the minimum pressure was controlled in less than a negative atmospheric pressure the longer the standpipe,the larger the flow rate and also the minimum pressure would be low.The calculation also proved that in a fixed length of standpipe, the farther the location was away from the roof outlet,the higher the pressure would be.The mini-mum pressure appeared at the beginning of the standpipe.