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推进     
相关语句
  propulsion
    ON THE STUDY OF MAGNETOHYDRODYNAMIC PUMP SHIP PROPULSION
    船舶电磁流体动力泵推进的研究
短句来源
    An Exploratory Study on a Propeller Propulsion System with Greater Cavitation Number,Higher Rotating Speed and Higher Efficiency
    高空泡数高转速高效率螺旋桨推进系统
短句来源
    Axial Vibration of Marine Diesel-engined Propulsion Shafting System
    柴油机船推进轴系装置轴向振动
短句来源
    Effects of Slightly Reduced Afterbody Block Coefficient with Attached Bulbous Bow on Resistance and Propulsion of large Full Ships
    略减后体方形系数并加装球鼻首对肥大船阻力和推进的影响
短句来源
    ACCELERATION STATE DYNAMIC SIMULATION OF A GAS TURBINE PROPULSION SYSTEM
    燃气轮机推进系统加速过程动态仿真
短句来源
更多       
  propelling
    Development of Torpedo Concerning a New Type Power Battery and Propelling Electrical Machinery
    鱼雷新型动力电池与推进电机的发展
短句来源
    Torsional Vibration Chart of Propelling Shaft System of Marine Diesel
    船用柴油机推进轴系扭振图谱
短句来源
    Brief analysis of two-speed fixed-pith propeller propelling system design
    “双速——定距桨”推进系统设计浅析
短句来源
    An Elementary Analysis of “Two-Speed &Fixed-Pitch Propeller” Propelling S ystem Design
    “双速—定距桨”推进系统设计浅析
短句来源
    A Review and Forecasting of the Ship's Propelling System Development
    对舰船推进系统发展回顾与展望的若干认识
短句来源
更多       
  propulsive
    45m Changjiang Passenger Ferry with Twin Cochlea-Channeled Stern and Fine Propulsive Performance
    具有优良推进性能的45m蜗尾长江客渡船
短句来源
    Influence of Propeller's Turning on Propulsive Performance of Pushboat
    螺旋桨旋向对大径深比推船推进性能的影响
短句来源
    A New Design to Incresrse Propulsive Efficiency of Catamarn
    提高双体船螺旋桨推进效率的设计研究
短句来源
    Consideration on Some Key Dynamic Factors in Alignment of Propulsive Shafting for PS30 Hydrofoil Passenger Ferry
    PS30水翼客船推进轴系校中若干动态因素的考虑
短句来源
    Compound Propulsive Steering Controller
    复合式推进操纵控制器
短句来源
更多       
  propelled
    ELECTRIC PROPELLED MARINE MAINE ENGINE COOLING WATER CONTROL SYSTEM
    电力推进船舶柴油机冷却水控制系统
    A NEW STEERING DEVICE SUITABLE FOR WATER JET PROPELLED SHIPS
    一种新型喷水推进操纵装置
短句来源
    At present, with the increasing tonnage of ship and more and more ships propelled by electric power, the capacity of a generator in a marine power station is getting larger and larger.
    目前,由于船舶吨位的不断增加以及柴油机—电力推进船舶的不断涌现,使船舶电站发电机的容量越来越大。
短句来源
    At present, with the increasing tonnage of ship and more and more ships propelled by electric power, the capacity of a generator in a marine power station is getting larger and larger and the control system of voltage stability in vessel must be with better performance.
    目前,由于船舶吨位的不断增加以及电力推进船舶的不断涌现,使船舶发电机的容量越来越大,并且对船舶电站控制系统提出了更高的要求。
短句来源
    A new steering device suitable for water jet propelled ships is pre-sented in this paper.
    本文介绍了一种用于喷水推进船舶的新型操纵装置。
短句来源
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      propulsion
    Research on swimming by undulatory long dorsal fin propulsion
          
    On the basis of observation and experimental data, a simplified kinematic model on locomotion of the undulatory long dorsal fin propulsion is promoted.
          
    It is suggested that the undulatory long dorsal fin propulsion is an adaptation to swimming with high hydromechanical efficiency.
          
    The Use of a Solar Electrojet Propulsion System for Jupiter Satellite Injection
          
    Low-thrust flights from high-elliptic orbits are of considerable interest, since they allow one to decrease (compared to high-thrust flights) the propulsion consumption and to reduce the flight duration.
          
    更多          
      propelling
    Limiting detonation velocities and limiting propelling powers of organic explosives
          
    The structure and nature of motion of the contact zone during the noninstantaneous opening of a diaphragm in a shock tube are analyzed for the case of Re→∞ and equal adiabatic indices of the propelling and propelled gases.
          
    Calculation of the thrust of a wave-powered marine propelling device
          
    A scheme for calculating the thrust of a wave propelling device with limiters is proposed.
          
    The scheme can be extended to similar propelling devices with a more complex wing suspension or a more complex wing system.
          
    更多          
      propulsive
    Propulsive efficiency of a vibrating wing in a supersonic flow
          
    On the propulsive efficiency of vibrating bodies in a subsonic gas flow
          
    The propulsive efficiency of a vibrating cylinder in a supersonic flow
          
    With a mass flow rate of 50 g/s, the engine may develop a propulsive force of 2000 N.
          
    The mass-energy and specific characteristics of the propulsive jet discharges of rockets were factorized.
          
    更多          
      propelled
    The structure and nature of motion of the contact zone during the noninstantaneous opening of a diaphragm in a shock tube are analyzed for the case of Re→∞ and equal adiabatic indices of the propelling and propelled gases.
          
    In the study [3] of flow on a self-propelled body (momentumless wake), Naudascher used a similarity concept of more general type.
          
    In turn, the system of slugs is propelled from the injection points to the extraction wells by the water used for ordinary flooding.
          
    Gas dynamic flow properties in the problem of two incompressible plates propelled by explosion products
          
    The method proposed in [1, 2] is used to construct an analytic solution of the problem of two incompressible plates propelled by the explosion products of a condensed explosive.
          
    更多          


    ~~

    我国于1956年曾制造了一批喷水推进船舶,现已用于各省之内河中。在运用过程中发生了不同的效果,有待于作进一步的研究。我国工农业大跃进后,各省内河均需大量的浅水船舶,故对喷水推进船舶作一深入的分析研究,实属必要。作者在本文中首先从理论上作了探讨指出了提高喷水船效率的一些方向;并举出实例,对喷水推进及螺旋桨推进作了分析比较,从而归纳出几点结论。本文共分三部份:(一)喷水推进的理论效率;(二)喷水推进与螺旋桨推进的比较;(三)结论。

    The aspect of lines design is reviewed for a number of inland water towboats based upon some of the trial results of having draft below 1.2 m The paper first describes the principal dimensions, form coefficients, performance characteristics and other problems of these towboats, then analyses and investigates the lines design of shallow draft towboats. With reference to the inland waterways condition of our country, the fore body and after body forms of existing shallow draft towboats have been considered. In...

    The aspect of lines design is reviewed for a number of inland water towboats based upon some of the trial results of having draft below 1.2 m The paper first describes the principal dimensions, form coefficients, performance characteristics and other problems of these towboats, then analyses and investigates the lines design of shallow draft towboats. With reference to the inland waterways condition of our country, the fore body and after body forms of existing shallow draft towboats have been considered. In view of the resistance and propulsion, the load water line, shape of sections, half angle of entrance, forms of tunnel and their effect on propeller were analysed and compared. According to the service performance of these towboats, a relatively adequate fore and aft boby form and a suitable type of tunnel are presented. The relation of principal parameters of hull with lines design is discussed. Further, in connection with lines design, the problem of stability and steering has been investigated. Finally, the author suggests that the following eoefiicients are expected: 1) Block coefficient 0.65 2) Prismatic coefficient 0.70 3) Midship section coefficient = 0.85~0.95 4) Waterline coefficient >0.8

    本文根据我国一些建造数量较多或做过试航鉴定、吃水在1.2米以下的内河螺旋桨拖输,在线型设计方面加以总结。文中首先介绍了这些拖输的主要尺度、船型系数、性能指标、使用情况和存在问题。然后对浅水拖输的绕型设计进行分析研究。根据我国航道条件就现有浅水拖输艏艉线型形状进行了探讨,从阻力和推进观点出发对满载水线、横剖面形状、半进水角和各种墜洞以及它们对螺旋桨的影响等加以分析、比较。根据这些拖输在实际使用中的优缺点,提出比较适当的艏艉线型形状和墜洞类型。文中还探封了船体各种主要参数与线型设计的关系。讨论了各种主要尺度比、船型系数对阻力和推进的影响以及它们在浅水拖输设计中的常用范围。此外还讨论了与线型设计有关的稳性和操纵性问题。最后得出了简短的结论。

    Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should...

    Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should rate their auxiliary engines into two ranks,namely,normal service rating and overload rating,and their main propulsion engines into trial trip rating,maximum service rating and normal service rating.Scientific definifion of these ratings are explained and their empirical relati- ons are also given. The bases of nominal rating are standard ambiant atmospheric conditions and installation condi- tions.The author proposes that standard ambiant atmospheric conditions should be based on the mean conditions in the test shop of the most diesel engine factories throughout the country.However,the naval architects should rate their engines according to the particular conditions of the appointed navigation zone and the kind of service to be attained.Numerical data of ambiant atmospheric conditions and installation conditions proposed are:736mmHg.,20℃,70% humidity,and less than 150 mm WG vacuum in the intake air system,30~300mmHg back pressure in the exbaust system.The calculation method in practice for correcting nominal rating and specific fuel consumption according to the variations of ambiant atmospheric conditions differ largely one another.For non-supercharged diesel engines,new correction formulas according to constant fuel pump rack and constant fuel/air ratio respectively are recommended in the paper.The results of comparison of these proposed fornmlas with others in practice and also with published test data show that the recommended formulas are more reasonable,although the correction is still slighly too high. The ambiant conditions on board differ largely with those in test shop,so the determination of service rating depends upon the specification of ambiant atmospheric conditions in the machinery compartment.Three kinds of standard ambiant conditions in machinery compartment,for high sea,east- south sea and north sea-going ships respectively,are given in this paper.These numerical data are deter- mined by statistical method.In the determination of service rating,the influence of wear,rpm.,insta- bility and power reserve must be considered.Its empirical coefficients are introduced.Generally,the normal service rating for auxiliary engines is about 75~82% of the nominal rating from manufacturer and 70~99% for the main propulsion engines.

    船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计...

    船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远洋、东南海及比海航行的三种船舶之标准机仓大气条件;同时推荐了在送定使用功率计算中为考虑磨损、转速不稳性及功率贮备等因素所采用的系数。对于发电用的柴油机船上使用功率一般为额定功率的76~82%,对于推进主机则为70~79%。近年来,在我国船舶上,通常发现由于各方面对船用柴油机功率标定缺少统一妁理解,往往引起柴油机的实际使用功率超出其能力,以致引起柴油机超负荷、螺旋桨转速或发电量达不到设计要求,严重的甚至会引起发动机损坏。柴油机功率按不同大气条件的修正亦常常引起制造厂与验收部门的争执。这些问题虽然在我国有关标准中已作了某些规定,但仍有继续探讨的必要。本文着重对额定功率与使用功率的关系、标准大气条件的确定以及功率和耗油率按大气条件变化的修正等问题提出一些看法。

     
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