Numerical investigation on flow field characteristics of integral particle separator
This paper is a study and research result of vane less integral particle separator where numerical simulation of its inner flow field and the particle movement locus characteristic was undertaken with the application of calculation software Fluent. This paper obtains the characteristic of the total pressure loss from the inlet to the clearance stream outlet and the main stream outlet while the SCR differs, and its inner flow field, and also the distribution of total pressure loss at the clearance stream outlet and particle movement locus. The calculation was undertaken by using the Realizable k-ε model and using Lagrange track model for discrete phase. The research result shows: In the clearance stream, the fluid appears of the whirlpool structure. The total pressure loss decreases while the SCR increases, and increases as the main stream flow increases. On the inner side at the clearance stream outlet (near the splitter), the total pressure loss decreases as the SCR increases, while in the outer side (near the outer wall), the total pressure loss increases as the SCR increases. In the main stream, the total pressure loss increases as the SCR and the main stream flow increase. Micro-size particles barely collide with wall, and some of them enter the main stream flow, while most of large grain size particles collide with wall and enter the clearance stream where they are discharged.
Measurements of particles rebound characteristics on materials used in gas turbines
This paper describes an experimental method used to find the rebound characteristics of small solid particles impacting different materials. Such data are used for particle trajectories and erosion calculations in turbomachinery. The materials which are investigated are: 410 Stainless Steel, 2024 Aluminum, 6A1-4V Titanium, INCO 718, RENE 41, AM355, L605 Cobalt, and Alumina (A12O3). Particle materials are fly ash of 15 p. In addition, erosion rate equation was developed for INCO 718 that predicts the erosion rates at high temperatures very well.
Installed Engine Performance in Dust Laden Atmosphere
Abstract : Aircraft engines operating in areas where the atmosphere is polluted with small solid particles are subjected to erosion damage and consequently, their performance deteriorates. This paper presents the results of an investigation of the solid particles dynamics through a helicopter engine with inlet particle trajectories were determined through the five stage axial flow compressor. The results are presented to show the particle distribution throughout the compressor and the intensity of the particle blade impacts at the various stages. Originator furnished keywords include: Engine performance, Dust, Aircraft engines, Particles, Erosion, Helicopters.