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从笛形管设计原理出发,介绍了笛形管全尺寸热、流量分配计算方法,并给出了计算实例,反映笛形管在流向上热量、流量的变化。结果表明:当笛形管限流孔孔距、孔径不变时,笛形管前段由于通过流量较大,热、流量参数变化比较平稳,随着笛形管流向距离的增加,管内通过流量变小,热、流量参数变化逐渐加剧,当到达笛形管末端时,热气温度迅速下降,导致限流孔热功率随之迅速衰减;并且,同一笛形管入口压力相同时,随着入口温度的下降,热气流量逐渐增加,但每个限流孔热功率逐渐下降。
Based on the design principle of the fluted tube, the calculation method of the full-size flute and flow distribution of the fluted tube is introduced, and a calculation example is given to show the variation of the fluency and the flow rate of the fluted tube in the flow direction. The results show that when the flute orifice orifice aperture is constant and the orifice diameter is constant, the front section of the flute tube is relatively stable due to the large flow rate and the heat flow. The flow direction changes with the increase of the flute flow direction. Small, hot, flow parameters gradually increased, when reaching the end of the flute, the hot gas temperature dropped rapidly, resulting in rapid reduction of thermal power flow limiting hole; and, with the same bellows inlet pressure at the same time, with the inlet temperature Decreased, hot gas flow increased gradually, but the thermal power of each orifice decreased gradually.