【摘要】 针对黄河含沙量大、干流水库不同程度淤积的状况,提出了一种水动力与强人工干预有机结合的泥沙负载提高方法,即通过气动系统使水体中产生气泡,增强水流的紊动强度及垂向流速,提高水流的挟沙、输沙能力。通过水槽试验,对黄河原型沙在气动装置辅助下的起动与输运进行了研究。结果表明:在一次排气过程中,覆盖于排气孔上方的泥沙中有28%的泥沙得以起动并被水流输送,且其中仅有8%落淤到下游水槽中,20%的泥沙被带出水槽,取得了明显的清淤效果。同时,针对小浪底水库的淤积特点,对将气动冲沙法应用到小浪底水库的可行性进行了分析并提出了初步方案。更多还原

【Abstract】 The sediment concentration in the Yellow River is large and the reservoirs in the mainstream suffer from siltation of different degrees. A new concept and method that combining hydraulic power with strong artificial measure was proposed by this article. This method used pressure air to uplift flow in order to enhance turbulence and improve sediment transport. A flume test was introduced by this paper to study the transport of the prototype sand in the Yellow River. The results show that 28% sediment over the air vent is setting up and carried by flow during a period of deaeration, while only 8% settle down in the down reach of flume, which means 20% is carrying to the outside of flume. Taking Xiaolangdi Reservoir of the Yellow River for an example, the feasibility of applying pneumatic system was analyzed and a preliminary scheme was proposed.更多还原