桨

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有：1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因，提出减容改造方案，并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要，参考现有资料、文献和前人的研究成果，进行低比转速轴流式转轮叶片水力设计方法的研究，对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索，结合现代计算机技术，找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后，结合本课题的特点，选用Visual Basic语言，综合应用软件工程的设计思想，进行低比转速轴流式转轮叶片水力设计软件的编制，为系统设计了直观、简洁和标准的Windows人机对话界面，便于用户操作；编程时在考虑到设计条件特殊性的同时，尽量做到程序的通用性，使之可用于解决同一类问题；另外，大部分程序还可移植到普通轴流式转轮叶片水力设计中，具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口，对AutoCAD进行二次开发，在AutoCAD下实现水力图的自动生成和编辑，直至输出符合实际工程要求的木模图。5 通过算例，为多哇水电站设计了一个低比转速轴流定桨式转轮，解决其在枯水期小流量下不能发电的问题。

In this dissertation, based on the background of industrial application of a kind of hydrofoil impeller in penicillin fermentation, several problems related to the optimization and operation for design and operation of hydrofoil impellers in industrial fermentors have been studied in details.

本文以翼型桨在青霉素发酵工艺中的工业应用为背景，以工业规模发酵罐中翼型搅拌桨优化设计和操作为目标，对有关诸多问题进行了探讨。

The trimmable surface drive system, with ±7 degree trim and ±23 degree horizontal angle, can change the propeller shaft thrust direction in order to bring good maneuverability and navigability.

可靠性和快速性比常规驱动方式有显著提高，纵倾±7°和水平±23°可调式表面桨装置，可适时改变桨轴推力方向，使艇具有优异的操控性和适航性。

A short light oar used without an oarlock to propel a canoe or small boat.

用来推动轻舟或小船的没有桨架的短小的桨。

Oar used without an oarlock to propel ''.

小船'。''的没有桨架的短小的桨。

Nautical A wooden implement having a blade at one end or sometimes at both ends, used without an oarlock to propel a canoe or small boat.

宽叶短桨：一端有扁平的叶片或者有时两端都有叶片的一种木制工具，使用这种工具不用桨架就可以推动船或小舟

A wooden implement having a blade at one end or sometimes at both ends,used without an oarlock to propel a canoe or small boat.

宽叶短桨一端有扁平的叶片或者有时两端都有叶片的一种木制工具，使用这种工具不用桨架就可以推动船或小舟

Sculling is a variant of rowing in which each oarsman controls two oars , one in each hand .

单人双桨赛比赛是赛艇的一个变种，它由一位赛艇运动员一手一只桨来操纵桨。

And the oarsman never missed a stroke.

与此同时，桨手们手中的桨一下不拉地划着。

Oxford's Australian rower Toby Medaris, the heaviest oarsman in the contest at 102.6-kg, said he did not pay much attention to the race.

牛津队的澳洲籍桨手马达瑞斯表示，他只是以平常心看待这次比赛。马达瑞斯体重一百零二点六公斤，是这次比赛最重的桨手。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失