| 1. | Study on effect of hydrodynamic characteristics on reaeration progress
水动力学条件对复氧过程的影响研究 |
| 2. | Numerical simulation on hydrodynamic characteristics of bifurcation pipe with internal crescent rib
内加强月牙肋三岔管水力特性数值模拟 |
| 3. | The theoretical calculation method about how to predict the hydrodynamic characteristics of ichthyoid rudder is proposed in this paper
本文提出了一种鱼形舵定常升力的水动力性能预报的理论预报方法。 |
| 4. | In addition , the data needed to survey and the equation concerned is given . the elements that affect the hydrodynamic characteristics of ichthyoid rudder are analyzed
在试验设计部分，给出了鱼形舵敞水试验的具体思路，有关设备、装置，需要测量的主要数据，处理数据所要用到的主要公式等。 |
| 5. | In the first part , the steady nonlinear vortex lattice method is adopted to calculate the hydrodynamic characteristics of open water ichthyoid rudder , and the induced velocity of ichthyoid rudder is calculated using panel method
本文理论计算部分，采用定常非线性涡格法计算鱼形舵的水动力性能，用面元方法计算舵流场的诱导速度。 |
| 6. | In the second part , firstly , the mathematical model for predicting hydrodynamic characteristics of varivec propeller under steady or unsteady condition are present , based on the general propeller lifting - surface theory , potential flow theory and green theorem . then , theoretical calculation methods for predicting hydrodynamic characteristics of varivec propeller designed above paragraphs are present , based on the finite basic solution method , the unsteady vortex lattice method and hess - smith method
在理论计算部分，本文首先基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器水动力性能计算的数学模型，然后利用有限基本解法、非定常涡格法和赫斯?史密斯方法对全方向推进器定常和非定常状态下的数学模型进行了数值离散，接下来针对前面所设计的全方位推进器进行了数值预报。 |
| 7. | On the basis of consulting a large number of literatures domestic and aboard , the present situation and latest development of hydrodynamic characteristics of overland flow and slope erosion dynamic process were reviewed . aiming at revealing the effect of rainfall splash intensity on hydrodynamic features of sheet flow and slope erosion , with a combination of runoff experiment and simulated rainfall experiment with a fixed intensity , applying hydrodynamic and erosive theory , the effect of rainfall on overland flow velocity and the influence of rainfall splash intensity on hydrodynamic features ( such as velocity , flow depth , flow patterns , resistance ) of sheet flow on slope and the influence of rainfall splash intensity on the overland flow sediment contain was researched
本文在查阅了大量国内外文献资料，全面了解了坡面流水动力学特性及坡面侵蚀动力过程等方面的研究现状及最新进展的基础上，以揭示雨滴打击动能对坡面薄层水流水动力学特性及坡面侵蚀的影响为目标，采用水槽放水试验和定雨强模拟试验相结合的方法，运用水动力学与侵蚀理论，研究了降雨对坡面薄层水流流速的影响，雨滴打击强度对坡面薄层水流流速、水深、流态、阻力等水动力学参数的影响，雨滴击溅作用对坡面流泥沙含量的影响。 |
| 8. | In order to predict hydrodynamic characteristics a computational system is developed including determination of the pressure distribution on a wing section by use of the conformal mapping method and panel method respectively and of the flow in boundary layer according to the thin shear layer approximation ( tsl ) for navier - stokes equation approach . the wing sections of naca4412 and naca0012 are applied to test the computational system . the numerical inspection shows that the panel method with better precision and the momentum and the displacement thickness of boundary layer can be used to complete this calculation
本文分别用守屋的保角变换法和基于源汇涡分布的面元法，建立了计算桨叶表面压力分布的数学模型；应用纳维-斯托克方程的薄层近似理论模式和有限差分数值方法，建立了计算机翼表面边界层内部流动的数学模型；应用桨叶表面边界层内部粘性流动和外部势流流动在边界上的匹配算法，建立了桨叶表面二相流流动的计算方法和相应的计算机程序。 |
| 9. | Based on the commonly used strip theory with the extension of taking into account the instantaneous variation of the wetted hull surface during the motion and its effects on the ship hydrodynamic characteristics , this dissertation mainly calculates the ship motions and loads in waves in time domain and elementarily investigates some nonlinear characteristic of ship motion and hydrodynamic coefficient . it is hoped that the research had an engineering value for the predication and evaluation of seakeeping performance in the concept ship design stage
本文基于扩展的切片理论，计入船体运动时湿表面的变化及其对船体流体动力性能的影响，在时域内计算了船舶在波浪中的运动和载荷，并对船舶水动力系数及运动中的一些非线性因素进行了初步的探讨，本文的研究对船舶设计阶段的耐波性能评估具有工程实用价值。 |
| 10. | According to the mathematical model and the numerical method , the cavity shape and hydrodynamic characteristics of two kinds of head shape on cavitating axisymmetric bodies at zero attack are computed in this paper . because the discretization method have effect on the convergence of the results , different kinds of discretization are employed in the partially - cavitating and super - cavitating flows
依据建立的数学模型与数值方法，对两种典型的回转体头部线型(即头部为光滑过渡曲线的回转体和头部有突变角度的回转体)的局部空泡和超空泡绕流场进行了数值计算。 |
