Results 221 to 230 of about 1,127 (258)
Some of the next articles are maybe not open access.
Gas separation membrane cascades II. Two-compressor cascades
Journal of Membrane Science, 1996This paper presents and discusses a large number of gas separation membrane cascade schemes using two compressors. Although some of these cascade schemes are known in the literature, the majority are new, providing more options for a given separation task.
Rakesh Agrawal, Jianguo Xu
openaire +1 more source
Design consideration for multi-lingual cascading text compressors
Proceedings DCC'99 Data Compression Conference (Cat. No. PR00096), 1999Summary form only given. We study the cascading of LZ variants to Huffman coding for multilingual documents. Two models are proposed: the static model and the adaptive (dynamic) model. The static model makes use of the dictionary generated by the LZW algorithm in Chinese dictionary-based Huffman compression to achieve better performance.
Chi, Chi-Hung, Zhang, Yan
openaire +1 more source
A Navier-Stokes study of rotating stall in compressor cascades
24th Joint Propulsion Conference, 1988Numerical simulations of unsteady flow in a linear cascade of J-79 stator blades are conducted with a finite-difference method. The flowfield is determined by solving two-dimensional compressible Navier-Stokes equations. The effects of turbulence are accounted for by a mixing length model.
F. Davoudzadeh +3 more
openaire +1 more source
Loss and Stall Analysis of Compressor Cascades
Journal of Basic Engineering, 1959A simple equation expressing the wake momentum thickness as a primary function of the suction-surface diffusion ratio (ratio of maximum surface velocity to outlet velocity) of coaventional low-speed cascade blades is derived from boundary-layer theory in conjunction with simplifying approximations.
openaire +1 more source
Experimental investigation and design of a shape-variable compressor cascade
CEAS Aeronautical Journal, 2016The design of jet engine compressor blading always implies a compromise between design and off-design operation. The reason for this is a fixed blade geometry which has to be operated over a wide range of operating conditions. Consequently, maximum achievable efficiencies at design operation are limited by off-design requirements, e.g., a certain stall
Krone, Jan-Hendrik +6 more
openaire +4 more sources
Separated Flow in a Straight Compressor Cascade
1991Experimental results are presented concerning separated incompressible flow through two linear compressor cascades at off-design conditions. The first cascade denoted as RK3 has already been tested at high positive and low negative incidence angles. The second cascade having NACA 65–1810 profile was measured at high positive incidence angle.
J. Citavý, M. Dušek
openaire +1 more source
Modeling of Water Droplets Erosion on a Subsonic Compressor Cascade
Flow, Turbulence and Combustion, 2019In this paper an analysis of the erosion mechanism of water droplets impacting a compressor blade is performed. Three different models are compared: the Springer et al. model, developed in 1974 for predicting rain erosion on wind turbine blades; a new model developed by the authors to predict water droplet erosion on stainless steel surfaces and ...
Venturini P. +4 more
openaire +2 more sources
Design and Optimization of Tandem Arranged Cascade in a Transonic Compressor
Journal of Thermal Science, 2017This study proposed a design and optimization strategy for a tandem arranged cascade using the Non-dominated Sorting Genetic Algorithm (NSGA) II multi-objective optimization algorithm and Back Propagation (BP) neural network technology. The NASA Stage 35 was employed as the initial bench mark in the present study and five geometric control parameters ...
Haitong Wang, Yangang Wang, Lai Wei
openaire +1 more source
On Aerodynamic Loading of Linear Compressor Cascades
Volume 1: Turbomachinery, 1992A study is presented concerning a high loading of the pressure surface of a blade in a linear compressor cascade. Assuming the two–dimensional incompressible flow, two cascades denoted as RK3 and VD17 have been designed using an inverse method developed previously at SVÚSS.
openaire +1 more source
Experimental Investigation on Droplet Behaviour in a Transonic Compressor Cascade
Volume 2A: Turbomachinery, 2014In recent years overspray fogging has become a powerful means for power augmentation of industrial gas turbines. Most of the studies concerning this topic focus on the problem from a thermodynamic point of view as summarized by Eisfeld and Joos [1]. Only a few studies, however, were undertaken to investigate the droplet behavior in the flow channel of ...
Niklas Neupert, Birger Ober, Franz Joos
openaire +1 more source