A generalized propeller blade design method based on NURBS

2004 ◽  
pp. 61-66
Author(s):  
C Hsin ◽  
K Lien ◽  
C Wu
Keyword(s):  
Design Method ◽  
Blade Design ◽  
Propeller Blade

THEORETICAL METHOD OF THE OPTIMUM DESIGN OF A SUPERCAVITATING PROPELLER BLADE WITH SPOILER MOUNTED ON THE TRAILING EDGE

2021 ◽  
Vol 152 (A1) ◽  
Author(s):  
Zaw Win ◽  
G M Fridman ◽  
A S Achkinadze
Keyword(s):  
Design Method ◽  
Theoretical Method ◽  
Blade Design ◽  
Propeller Blade ◽  
Trailing Edge ◽  
Theoretical Design ◽  
Closure Scheme ◽  
Blade Section ◽  
Cavity Closure ◽  
Cfd Method

This paper presents theoretical design method to obtain 2-D optimum section with spoiler mounted on the trailing edge of a supercavitating propeller blade. Matched Asymptotic Expansions (MAE) is applied to determine the geometry of profile and cavity shape in the framework of potential flow theory. The blade section is of wedge-like shape and the opened cavity closure scheme is adopted. A typical section, on which the optimum blade design will be based, is singled out among the best individual sections from root to tip. The spoiler length of each hydrofoil section resulting from MAE method are finalized with CFD method so as to consider viscous effect under the same lift condition, others hydrofoil geometries being kept constant. The hydrodynamic performances of all blade sections being designed on the basis of the resulting typical section from linearized method are finally predicted with CFD method.

Pure Design Method for Aerofoils in Cascade

1969 ◽  
Vol 11 (5) ◽  
pp. 454-467 ◽  
Author(s):  
K. Murugesan ◽  
J. W. Railly
Keyword(s):  
Exact Solution ◽  
Velocity Distribution ◽  
Design Problem ◽  
Design Method ◽  
Tangential Velocity ◽  
Surface Velocity ◽  
Normal Velocity ◽  
Blade Design ◽  
Blade Shape

An extension of Martensen's method is described which permits an exact solution of the inverse or blade design problem. An equation is derived for the normal velocity distributed about a given contour when a given tangential velocity is imposed about the contour and from this normal velocity an initial arbitrarily chosen blade shape may be successively modified until a blade is found having a desired surface velocity distribution. Five examples of the method are given.

The Adaptive Blade Design and Evaluation of Wind Turbine

2010 ◽  
Vol 97-101 ◽  
pp. 2318-2323
Author(s):  
Wang Yu Liu ◽  
Jia Xing Gong ◽  
Xi Feng Liu ◽  
Xin Zhang
Keyword(s):  
Wind Turbine ◽  
Medial Axis ◽  
Coupling Effect ◽  
Design Method ◽  
Von Mises Stress ◽  
Blade Design ◽  
Adaptive Performance ◽  
Laminar Shear Stress ◽  
Von Mises ◽  
The Impact

This article explored the design method of the wind turbine blade being of flapping-twist adaptive performance and how to evaluate its feasibility and reliability according to the comprehensive factors. The results indicate that both spar cap and skin with off-axis carbon fiber can achieve the efficient flapping-twist coupling effect. Through overall investigation, the results show that the maximum fiber strains of tensile and compressive go up with increase of the off-axis angle, and the peak inter-laminar shear stress increase more rapidly. While, all of these evaluating indicators should be kept in the reference range for used materials. Moreover, when the off-axis angle increases, the peak Von Mises stress declines. In addition, the impact of natural frequencies on the blade design is proved to be insignificant. Finally, utilizing the medial axis laminates in the blade decoupled area is helpful to strengthen the blade fatigue resistivity.

Study on Wind Turbine Blade Design Method and Modeling Technology

2011 ◽  
Vol 88-89 ◽  
pp. 549-553
Author(s):  
Wen Xian Tang ◽  
Cheng Cheng ◽  
Yun Di Cai ◽  
Fei Wang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Design Method ◽  
Three Dimensional ◽  
Design Procedure ◽  
Wind Turbine Blade ◽  
Solid Model ◽  
Blade Design ◽  
Modeling Technology ◽  
Turbine Blade Design

According to the design procedure of wind turbine blade, a design method that can make CAD software joint used was brought up. Wilson method was used to design and calculate the main data of blade. On this basis, the three-dimensional solid model of wind turbine blade could get by using and playing the function of different CAD software. This study provided a reference for the design of wind turbine blade and other similar complicated structures, which settles the basis for the further analysis of blade.

A Design Procedure for Large-Hub Propellers

1972 ◽  
Vol 16 (03) ◽  
pp. 167-173
Author(s):  
James Bruce Andrews ◽  
Damon E. Cummings
Keyword(s):  
Design Procedure ◽  
Blade Design ◽  
Propeller Blade ◽  
Lifting Surface ◽  
Line Sink ◽  
Circulation Distribution ◽  
Lifting Line

A procedure is given for the design of propellers with large hubs. The hub is modelled by a line sink. A lifting-line propeller model with no hub far downstream is used for thrust, torque, and efficiency calculations. The circulation distribution from this wake propeller is moved up the hub streamlines to the propeller plane for the actual lifting-surface propeller blade design.

A Parametric Study of Radial Turbomachinery Blade Design in Three-Dimensional Subsonic Flow

1990 ◽  
Vol 112 (3) ◽  
pp. 338-345 ◽  
Author(s):  
W. S. Ghaly
Keyword(s):  
Parametric Study ◽  
Subsonic Flow ◽  
Pressure Field ◽  
Design Method ◽  
Three Dimensional ◽  
Rate Of Change ◽  
Blade Design ◽  
Blade Loading ◽  
Pressure Fields ◽  
Blade Shape

An aerodynamic design method is described and used to implement a parametric study of radial turbomachinery blade design in three-dimensional subsonic flow. Given the impeller hub and shroud, the number of blades and their stacking position, the design method gives the detailed blade shape, flow, and pressure fields that would produce a prescribed tangentially averaged swirl schedule. The results from that study show that decreasing the number of blades increases the blade wrap, and that the blade loading is strongly affected by the rate of change of mean swirl along the mean streamlines. The results also show that the blade shape and the pressure field are rather sensitive to the prescribed mean swirl schedule, which suggests that, by carefully tailoring the swirl schedule, one might be able to control the blade shape and the pressure field and hence secondary flow.

scholarly journals A New Method (FTDCDF) for Blade Design of Axial/Mixed-Flow Compressors and its Applications

1987 ◽  
Author(s):  
Chuan-Gang Gu
Keyword(s):  
Good Accuracy ◽  
Design Method ◽  
Computational Method ◽  
Blade Design ◽  
Mixed Flow ◽  
Practical Applications ◽  
Controlled Diffusion ◽  
Aerodynamic Properties ◽  
Design Requirements ◽  
Design Result

A new design method with unequal work along the height of the blade in the axial/mixed-flow compressors, called The Flow-Type Design of Controlled Diffusion Factors (FTDCDF), has been developed in this paper. The idea of the method is to control the distribution of the diffusion factors along the height of the blade in the vaneless space in order to design the blade with good aerodynamic properties. The theoretical basis of FTDCDF and its computational method are studied in detail. The corresponding computer program has been developed and worked out with good results. Comparison between the results of this method and those of other one is made and discussed. It shows that the FTDCDF and program have good accuracy and convergence. On the basis of the author’s recent works, the practical applications of the FTDCDF for blade design and the choosing of distribution of diffusion factors are described in detail and the matching between the distributions of the diffusion factors and C1u(r1) is discussed. A better design result of FTDCDF satisfying various design requirements is presented.

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