Bionic microstructure on titanium alloy blade with belt grinding and its drag reduction performance

2020 ◽  
pp. 095440542094974
Author(s):  
Guijian Xiao ◽  
Yi He ◽  
Yun Huang ◽  
Shui He ◽  
Wenxi Wang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Drag Reduction ◽  
Cfd Simulation ◽  
Dynamic Performance ◽  
Belt Grinding ◽  
Grinding Method ◽  
Aero Engine ◽  
Engine Blade ◽  
Bionic Structure ◽  
Set Up

Researches show that surface with bionic structure plays an important role in improving the aerodynamic performance on aero engine parts. Belt grinding, a popular method to process titanium alloy parts such as aero-engine blade, is also found that it can be used to obtain bionic microstructure through special grinding method and parameters. In order to explore the performance of bionic microstructure processed by belt grinding and its effects on airflow dynamics, several groups of simulation and an experiment are carried out in this paper. Firstly, the mechanism of drag reduction of bionic microstructure is discussed. It shows that the effect of drag reduction of bionic microstructure is related to protrusion height, which is related to the shape and size of the bionic microstructure. Then, three groups of typical belt grinding bionic microstructure are set up. In addition, the drag reduction values are calculated in CFD simulation. The results are analyzed and discussed. Further, to verify the airflow dynamics of drag reduction of belt grinding bionic microstructure, an experiment of aero-engine blade is carried out. Finally, the effects of airflow dynamic performance of blade with belt grinding bionic microstructure are obtained in CFD simulation. In general, the shape of wave ribs, compared to V-ribs and trapezoidal ribs, has the best performance in drag reduction. To a certain extent, the improvement of airflow dynamic performance is higher with the increasing of the size of bionic microstructure, which suggests lower feed rate and higher grinding pressure for bionic structure.

scholarly journals Bionic Structure on Complex Surface with Belt Grinding for Electron Beam Welding Seam of Titanium Alloy

2020 ◽  
Vol 10 (7) ◽  
pp. 2370
Author(s):  
Guijian Xiao ◽  
Youdong Zhang ◽  
Yi He ◽  
Yun Huang ◽  
Shui He ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Welding ◽  
Ground Surface ◽  
Engine Performance ◽  
Complex Surface ◽  
Belt Grinding ◽  
Welding Seam ◽  
Aero Engine ◽  
Bionic Structure

Electron beam welding (EBW) is widely used to weld titanium alloy parts such as aero-engine casing and blades. The surface quality after EBW has a significant influence on the aero-engine performance of those parts. We propose a surface treatment method with grinding on a titanium alloy electron beam weld. We analyze the influence of grinding parameters on the characteristics of the grinding surface. The experiment shows the applicability of ground surface by belt grinding on EBW and its impact on aero-engine performance. After belt grinding, both the welded surface and the surface connected with the substrate are smooth. The extra height of the seam was less than 0.2 mm, and the surface roughness (Ra) of the weld after grinding can be less than 0.98 μm. The microstructure of the weld after grinding was analyzed. Two types of bionic shapes were obtained, a sawtooth shape with a width of 40 μm and a height of 10 μm and a wavy shape with a width of 20 μm and a height of 3 μm. From the analysis above, the bionic surface can be obtained by grinding on the weld with an abrasive belt.

scholarly journals Surface Fitting for non-Grid Data from in-Situ Measuring Systems of Aero-engine Blade

2020 ◽  
Vol 206 ◽  
pp. 03023
Author(s):  
Qing Mao ◽  
Sen Wang ◽  
Shugui Liu
Keyword(s):  
Dynamic Performance ◽  
Surface Fitting ◽  
Data Conversion ◽  
Machining Accuracy ◽  
Nurbs Surface ◽  
Grid Data ◽  
Measuring Systems ◽  
Aero Engine ◽  
Engine Blade

High machining accuracy of aero-engine blade largely determines the carrying capacity, endurance, acceleration and the dynamic performance of the aero-engine, so a reliable machining error inspection and evaluation technique is imperative. In order to give a reliable error evaluation, the non- uniform rational B-spline (NURBS) technique is adopted to reconstruct the surface within a specified accuracy. Usually, data points measured from aero-engine blade are non-grid data in situ measuring systems. To overcome the difficulty of NURBS surface fitting from non-grid data, a new method based on data conversion is proposed, in which chord length parameterization and uniform parameter sampling are combined together to realize the data convertation, and subsequently hierarchical fitting strategy is applied to finish the NURBS surface reconstruction. The way proposed for data conversion is easy to realize, and by which gemetrical features of original measured data are also reserved well, which make the whole method outstanding in low time cost. Experimental results show that the method is fast, effective. The source code has been implemented in VC++, while the resulting pictures are constructed in Matlab with the obtained control points, knot vectors, and the orders.

HELICAL TWISTED EFFECT OF SPIRAL PIPE IN GENERATING SWIRL FLOW FOR COAL SLURRIES CONVEYANCE

2017 ◽  
Vol 79 (7-3) ◽  
Author(s):  
Yanuar Yanuar ◽  
Kurniawan T. Waskito ◽  
Sealtial Mau ◽  
Winda Wulandari ◽  
Sri P. Sari
Keyword(s):  
Drag Reduction ◽  
Cfd Simulation ◽  
Flow Characteristics ◽  
Solid Material ◽  
Swirl Flow ◽  
Solid Particles ◽  
Test Loop ◽  
Helical Angle ◽  
Reduce Energy Consumption ◽  
Set Up

This paper proposes methods to reduce energy consumption for the transportation of coal slurries. Spiral pipe is one of the methods that can improve drag reduction at certain velocity as well as prevent decomposition at the pipe bottom and generate homogenous particles distribution. The objective is to investigate the influence of using spiral pipe to pressure drop and homogeneity of coal slurries. The pipe angles (β) are 140, 230, 400 and 560, the pipe test loop is set up with entrance length 3000 mm. Pressure Transducer and pitot tube are used in the measurements. Percentage of the particle concentrations are varied by weight of 30 %, 40 % and 50 %. The helical angle gives significant effect to eliminate decomposition at the pipe bottom. At CW 50 %, homogeneity of the slurries can reach around 96 % at helical angle 230, It means the mixture between solid material and water more uniform, using circular pipe the homogeneity is only 74 %. Weight concentration of the solid particles and Reynolds number gives significant effect to the drag reduction. Flow of CW =50 % slurry at Re~5x104 through 23° spiral pipe can increase drag reduction by about 30%. Velocity profiles were obtained from numerical CFD simulation validated experimental results make clear the flow characteristics.

Kinematics Analysis of Abrasive Belt Grinding Robot for Aero-Engine Blade and its Simulation

2014 ◽  
Vol 889-890 ◽  
pp. 1165-1169 ◽  
Author(s):  
Zhi Huang ◽  
Xu Ke ◽  
Shi Hang Cheng ◽  
Fen Qing Heng
Keyword(s):  
Industrial Robots ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Offline Programming ◽  
Kinematics Simulation ◽  
System Solution ◽  
Aero Engine ◽  
Engine Blade ◽  
Development Technology ◽  
Grinding And Polishing

This paper presents an abrasive belt grinding robotic system solution for traditional aero-engine blade manual grinding situation. In order to overcome the limitation of traditional polishing robot teaching programming way and improve the efficiency of the robot offline programming and simulation of interactive, based on OpenGL robot programming and motion simulation platform with interactive features is constructed with VC++6.0. The result shows that the system is able to realistically simulate the movement of industrial robots grinding and polishing process, and it provides a reference for the other abrasive belt grinding and polishing robot off-programming and kinematics simulation development technology.

A multi-particle abrasive model for investigation of residual stress in belt grinding of titanium alloys

2021 ◽  
pp. 095440542110079
Author(s):  
Guijian Xiao ◽  
Kangkang Song ◽  
Huawei Zhou ◽  
Yi He ◽  
Wentao Dai
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
Simulation Model ◽  
Fe Simulation ◽  
Service Performance ◽  
Belt Grinding ◽  
Surface Residual Stress ◽  
Technical Problems ◽  
Grinding Parameters ◽  
Aero Engine

The titanium alloy blade is a key part of an aero-engine, but its high surface efficiency and precision machining present technical problems. Belt grinding can effectively prolong the fatigue life of the blade and enhance the service performance of the aero-engine. However, the residual stress of the workpiece after belt grinding directly affects its service performance and life. The traditional single particle abrasive model simulation is limited in exploring the influence of grinding process parameters on surface residual stress. In this study, an ABAQUS simulation model of multi-particle belt grinding is established for titanium alloy material, a finite element (FE) simulation is conducted with different technological parameters, and the results are analysed. The critical belt grinding experiment is conducted on thin-walled titanium alloy parts, and the distribution characteristics of surface residual stress after grinding are studied to understand the influence of grinding parameters on the formation of surface residual stress. Comparing the results of the FE simulation and the grinding experiment, the common law of stress change and the prediction model are obtained. The results show that the multi-particle belt grinding simulation is consistent with the belt grinding experiment in terms of the influence of grinding parameters on residual stress. The simulation can serve as a guide in actual belt grinding to some extent. Directions for improving the multi-particle abrasive simulation model are discussed.

Effect of foreign object damage on high-cycle fatigue strength of titanium alloy for aero-engine blade

2020 ◽  
Vol 118 ◽  
pp. 104842
Author(s):  
Zhenhua Zhao ◽  
Lingfeng Wang ◽  
Kainan Lu ◽  
Yongjian Li ◽  
Wei Chen ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Strength ◽  
High Cycle Fatigue ◽  
Foreign Object ◽  
Cycle Fatigue ◽  
Foreign Object Damage ◽  
Aero Engine ◽  
Engine Blade

scholarly journals Interactive Strategy for Adaptive Belt Grinding Heterogeneous Data for an Aero-Engine Blade

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 84637-84648
Author(s):  
Y. Huang ◽  
Guijian Xiao ◽  
Y. Liu ◽  
F. K. Meng
Keyword(s):  
Heterogeneous Data ◽  
Belt Grinding ◽  
Aero Engine ◽  
Engine Blade
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