regressive erosion

In flood season, sediment discharge of reservoir retrogressive erosion is proportional to discharge and water surface slope before the dam, its rang is between Guduo and Dayudu.

0 7左右 ;水库汛期溯源冲刷输沙率与流量和坝前比降成正比 ,溯源冲刷范围一般在和大禹渡之间 ;水库近几年的排沙流量一般在 15 0 0～ 2 5 0 0m3 s之间 ,水库降低水位应控制在 2 92～ 2 95m范围内 ;9、10月水库蓄水发电运用水位可适当提高 ,控制指标是以不影响大禹渡附近河段的冲刷为前提。

A new-style of gas-liquid reactor,namely the double-loop WFGD reactor with falling film by cross-flow scrubbing,is proposed.

提出了一种新型横向冲刷式双循环降膜湿法脱硫方式,研究了串联给浆工况主要运行参数对脱硫效率的影响规律。

The wet flue gas desulfurization(WFGD) reactor with falling film by cross-flow scrubbing was brought forward firstly,in which the finned tubes were applied as the supporter of the falling film.

首次提出并设计了横向冲刷式降膜湿法脱硫反应器,并采用翅片管束作为降膜的载体。

Experimental study is conducted to investigate heat transfer enhancement and flow resistance performance of air transversal flow over Petal fin formed tube,and mechanism of heat transfer enhancement is also analyzed herein.

以空气为介质横向冲刷花瓣状翅片管（包括单管与管束）进行强化传热与流阻性能实验研究，并对其传热强化机理进行分析，结果表明，花瓣状翅片管的非连续周向翅片具有极好的传热强化效果，在实验范围内（Ｒｅ＝１０３～２×１０４），本文提出了横向冲刷花瓣状翅片管传热性能的计算方法与理论分析模型，其计算结果与实验值符合良好。

The experimental results and comparison with transversal flow over Petal fin formed tube in paper(Ⅰ) show that,with the same fluid power consumption and e ?2×10 4,the heat transfer coefficient of transversal flow over Petal fin form.

实验结果表明，与文（一）的横向冲刷情况相比，在相同功耗下，Ｒｅ＝２×１０４时，按实际换热面积计算，横向冲刷花瓣状翅片管比光滑管提高给热系数１３５。

Experimental study on heat transfer for gas flow across tube bundle in circular shell;

气流横向冲刷圆壳管束的传热实验研究

Field coordination analysis of gas flow across tube bundles;

气流横向冲刷管束湍流换热的场协同分析