Effects of Cone Angle and Inlet Blade Angle on Mixed Inflow Turbine Performances

Abstract

The development of the aerofoil-shaped turbomachine blades is of prime importance for achieving the appropriate deflection of a three dimensional flow through desired angles, to work at the same degree of incidence and thereby providing the required performances for the specific machine. The sensitivity of the rotor to incidence effects and tendency of the flow to separate from one or the other blade surface have given rise to considerations of the optimum incidence angle and cone angle for a mixed inflow turbine by a numerical investigation using the ANSYS-CFX code. In order to keep the rotor in the same casing some geometrical parameters have been hold constant and the Bezier polynomial is used to generate the new shape of the rotor blade when changing the cone angle magnitude.

Pengaruh Geometri Sudu Inlet Bagian Tip Dan Hub Turbin Propeller Pada Unjuk Kerja Aliran Horisontal

“…Hasil penelitian ini didukung dengan hasil penelitian [15] mengenai pengaruh sudut masuk. Dari hasil penelitian tersebut dinyatakan bahwa perubahan nilai sudut masuk akan mempengaruhi distribusi tekanan yang mengenai sudu, dimana distribusi tekanan pada sudu akan mempengaruhi perfoma dari turbin air.…”

“…dapat terkonversi semakin baik, sementara ada artikel ini, terdapat tambahan bulb statis tanpa adanya guide vane, hal tersebut menyebabkan aliran yang melalui sudu tidak semuanya terarah pada bagian inlet tip sudu, sehingga konversi daya juga tidak berjalan secara maksimal. Hasil penelitian ini sejalan dengan hasil penelitian Chelabi[15] mengenai sudut masuk dimana dalam penelitian tersebut didapatkan bahwa perubahan nilai sudut masuk memengaruhi distribusi tekanan yang mengenai sudu, sehingga diduga dapat…”

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

“…Abidat et al [13] studied the clearance effect between the rotor blades and the casing on the mixed turbine performance. In two cases, papers [14,15] studied the effects of the cone and the inlet blade angles on mixed inflow turbine performance. The first is for a fixed outlet volute section and the second for a variable outlet volute section.…”

Deflections and Frequency Analysis in the Milling of Thin-Walled Parts With Variable Low Stiffness

“…Parts, such as turbine blades, impellers, and similar that have thin-walled elements in their geometry, are indispensable in the automobile, aerospace and other industries [1][2][3][4]. Such responsible parts of the mechanisms are used in a variety of drive units [5].…”