Results 31 to 40 of about 3,013 (217)

Designing and updating the flow part of axial and radial-axial turbines through mathematical modeling

Open Engineering, 2015
The paper describes an algorithm for the design of axial and radial-axial type turbines. The algorithm is based on using mathematical models of various levels of complexity – from 1D to 3D.
Rusanov Andrey, Rusanov Roman, Lampart Piotr   +2 more
doaj   +1 more source

The Design Method of Axial Flow Runners Focusing on Axial Flow Velocity Uniformization and Its Application to an Ultra-Small Axial Flow Hydraulic Turbine

International Journal of Rotating Machinery, 2016
We proposed a portable and ultra-small axial flow hydraulic turbine that can generate electric power comparatively easily using the low head of open channels such as existing pipe conduits or small rivers.
Yasuyuki Nishi, Yutaka Kobayashi, Terumi Inagaki, Norio Kikuchi   +3 more
doaj   +1 more source

Variable-Speed Propeller Turbine for Small Hydropower Applications

Energies, 2023
Standard technical solutions are not cost-effective for many small hydropower sites. This study aims to demonstrate the workflow for the tailor-made variable-speed axial propeller turbine and provide proof of this concept. The turbine is designed to meet
Eva Bílková, Jiří Souček, Martin Kantor, Roman Kubíček, Petr Nowak   +4 more
doaj   +1 more source

Numerical Investigation of the Hub-Seal Mass Flow Rate Effect on the Axial Turbine Stage Efficiency [PDF]

EPJ Web of Conferences, 2019
The contribution deals with numerical simulation of compressible flow through the axial turbine stage equipped with the hub-seal. The current flowing from the hub-seal has a major impact on the secondary flow in the hub-region of the blade span.
Straka Petr
doaj   +1 more source

Comparison of Partial Admission Axial and Radial Inflow Turbines for Underwater S-CO2 Power Cycle System

水下无人系统学报
The reasonable application of supercritical carbon dioxide(S-CO2) power cycle systems to unmanned undersea vehicles(UUVs) can help address the problem of low efficiency for the existing UUV steam power cycle systems, especially for small-power ...
Hanwei WANG, Xiaopeng JIANG, Kai LUO, Jianan ZHANG, Jianjun DANG, Kan QIN   +5 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

A Multi-Parameter Iterative Design-Correction Method and Performance Analysis for sCO₂ Axial Turbine Stages

Applied Sciences
To facilitate accurate physical interpretation and representation of various design concepts for supercritical carbon dioxide (sCO2) axial turbines and to improve both the efficiency and accuracy of their thermodynamic design, two conceptual design ...
Luhan Yin, Lei Zhang, Yuang Shi, Luotao Xie, Zichun Yang   +4 more
doaj   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Direct-Drive Conical-Rotor Permanent Magnet Synchronous Generator for Turbo-Expander, Accounting for Adaptive Equilibrium of Axial Force

IEEE Access, 2018
The permanent magnet synchronous generator (PMSG) has been widely employed in high-speed direct-drive turbo-expander for distributed energy generation.
Jiaobao Wang, Shoudao Huang, Chao Guo, Haokun Wu, Yaojing Feng   +4 more
doaj   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source