桨叶

The agitation power consumptions in boiling systems decrease uniformly with the increase of agitation speed, whereas the relative power demand (RPD-the ratio of agitation power input of HEDT for gassed system to that for ungassed system and under the same agitation speed) can maintain at a high level for high gas loadings even when the impeller is operating with a high impeller tip speed. The gas hold-up in the boiling system is much lower than that in the cold gassed system, and the gas hold-up in boiling system increases at first and then decreases with the increase of the agitation power consumption per liquid mass P(subscript m. It implies that the boiling three-phase system has a maximum gas hold-up point. The changes of nucleation site of vapour bubble and the character of suspension of the solid particles with the rotational speed of the impeller are responsible for those behaviors mentioned.

在沸腾条件下，搅拌功率消耗随着搅拌转速的增加有所下降，但HEDT桨具有较高的载气能力，即使在高叶端线速度下，相对功率消耗仍能保持在较高的水平；沸腾体系的气含率随单位质量流体输入功率的增加表现出先增后减的规律，即存在气含率的极大值，蒸汽成核位置和固体颗粒悬浮特性随搅拌功率增加而改变是造成上述行为的主要原因；沸腾体系中的气含率远远低于常温通空气体系。

Completely covered with skins except for a single or double opening in the ''.'center'.'' and propelled by a double-bladed paddle.

中心'。''有一两处开口外全部用皮覆盖，这种划子是用两叶桨推动的

Author has carried on experiment research and flow-field analysis to the large-two blade impeller and basic four kinds of glass-lined impellers in China,has investigated impeller type,rotational speed,materials,etc.

对大双叶片式搅拌器及国内4种搪玻璃搅拌器进行了实验研究及流场数值模拟，考察了桨型、转速、物料对各种搅拌器搅拌功率和混合时间的影响。

For multiplicity and variability of reaction processes, domestic traditional glass-lined agitators can't satisfy the technics requirement at the present day, a new type agitator called large-double-blade impeller was brought forward.

由于反应物料的多样性以及反应过程的多变性，国内传统的搪玻璃搅拌器(桨式、叶轮式、锚式和框式)已不能完全满足新技术、新工艺的要求，开发新型搅拌器势在必行。

An axial hydraulic reaction type turbine with adjustable runner blades operated with a high flow rate.

轴流转桨式水轮机；卡普兰式水轮机转轮叶片可与导叶协联调节的轴流式水轮机。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。