Development of Optimum Thin-Walled Parts Milling Parameters Calculation Technique

Dobrotvorskiy, Sergey; Kononenko, Serhii; Basova, Yevheniia; Dobrovolska, Ludmila; Edl, Milan

doi:10.1007/978-3-030-77719-7_34

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…Abidat [9] and Abidat et al [10] developed a new method of blade profile generation using the Bezier polynomials. The works [11][12] include research to ensure high-quality mechanical machining of turbine blades for regular operation. Abidat et al [13] studied the clearance effect between the rotor blades and the casing on the mixed turbine performance.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

Chelabi¹,

Basova²,

Hamidou³

et al. 2021

JES

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An investigation on new rotor blade designs conceived to produce higher exit relative kinetic energy of a mixed flow turbine is undertaken. Accelerating the flow through the rotor in a relative frame of reference improves energy transfer to the shaft, which is only produced in a rotating rotor. A three-dimensional converging rotor channel might respond to the analysis requirements in the subsonic flow regimes. Effectively, the machine experiences a 3.71 % and 3.67 % increase in work output and efficiency, respectively, representing this study’s primary intent. This has been accomplished by varying the shroud profile to a lesser eye tip diameter, then the hub profile to a larger eye root diameter. At last, both shroud and hub profiles are varied. It appears possible to enhance the performance of the rotor in terms of optimum work done and efficiency by devising suitable blade geometry designs. ANSYS CFX 15 is the code of all simulation works.

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Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

Chelabi¹,

Basova²,

Hamidou³

et al. 2021

JES

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“…Threading is a dynamic process in which the movement of several machine parts is synchronized with the position of the rotating spindle [9]. The accuracy of movement of each organ is determined by the combination of characteristics of the individual elements involved in this process: motors [10], servos [11], software control algorithms [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Smooth Acceleration of Transverse Axis Movements in CNC Threading Machining

2023

IJOMAM

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Most of the complex details of modern technical products are manufactured on CNC equipment. The threaded surface is one of the most critical elements of such parts. Their reliability and durability largely depend on the accuracy of the machining process. Machining threaded surfaces requires precise synchronization of periodic tool movements with the continuous rotation of the spindle. Ensuring smooth movement along the transverse axis with a synchronized approach to the machined surface is one of the important tasks. A variant of solving this problem in a two-level CNC system is proposed. A mathematical model of the movement along the transverse axis with a smooth variation in acceleration has been developed. A technique is proposed using an S-shaped feed profile based on the sin² function, which provides ease of calculation and high accuracy. The model is implemented in a two-level CNC. The results of experimental studies are shown that servo error decreases to a value of the order of 0…-1 μm before the end of the approach section, outside the workpiece.

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“…It has been established [45] that for larger absolute exit kinetic energies, for values of deviation blade angle between −10 • and −20 • , an exhaust diffuser is recommended to recover a part of it into a greater expansion ratio. Kononenko et al [46] examined the deflections and frequency in the milling of thin-walled parts with variable low stiffness; Dobrotvorskiy et al [47] developed an optimum thin-walled parts milling parameters calculation technique. This study will present the effect of inlet average diameter to exducer mean root diameter ratio on mixed inflow turbine performances in two cases.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Main Geometrical Parameters on the Design and Performance of Mixed Inflow Turbines

Chelabi¹,

Dobrotvorskiy

Basova

et al. 2022

Applied Sciences

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The blade shape is of great interest to hybrid turbine designers, due to its significant and direct impact on turbine performance. The inlet and outlet diameters of the vane affect the size of the rotor, which is limited because of the small space available in internal combustion engines. The effect of the ratio of the average inlet diameter and the average exducer inlet diameter on the performance of a mixed inlet turbine will be the focus of this study, which consists of two cases included herein for the purpose of illustrating the means of improving rotor performances and controlling the flow mass rate. In the first case, we achieved this by changing the average diameter of the exducer inlet, while, in the second one, we achieved this by changing the average inlet diameter. Additionally, the angles of the inlet and outlet blades were recalculated to preserve the same blade profile and to eliminate the effect of curvilinearity. It was noted that the shape of the blade was very sensitive to changes in the ratio of the investigated diameters, and—in both cases—interesting results were obtained. First, an increase in output work and in total static isentropic efficiency by 2.16% and 2.15%, respectively, was generated, with a saving of 3.52% of the used mass flow and a lighter rotor compared to one that used to take up the same space by using fixed average inlet diameter blades. In the second case, there was an increase in the output work by 3.31%, and in the total static isentropic efficiency by 3.34%, but the rotor became heavier and required an increase in the mass flow used. Since inter-blade flows are very complex, three-dimensional and viscous—featuring various types of secondary and eddy flows—the CFX.15-CFD code was used in all models to solve the averaged Navier–Stokes equations.

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Development of Optimum Thin-Walled Parts Milling Parameters Calculation Technique

Cited by 11 publications

References 15 publications

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

Analysis of the Three-Dimensional Accelerating Flow in A Mixed Turbine Rotor

Smooth Acceleration of Transverse Axis Movements in CNC Threading Machining

Influence of the Main Geometrical Parameters on the Design and Performance of Mixed Inflow Turbines

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