Results 41 to 50 of about 21,207 (144)

Clocking In Turbines: Remarks On Physical Nature And Geometric Requirements

Polish Maritime Research, 2015
The article discusses two issues relating to the clocking phenomenon in turbines, which are the physical course of stator wake deformation in rotor passages and its further interaction with downstream stator blades, and turbine geometry parameters which ...
Swirydczuk Jerzy
doaj   +1 more source

CONCEPT OF HYDROPOWER POTENTIAL OF THE BEDNJA RIVER AT THE LOCATION LOVRENTOVEC, CROATIA

e-Zbornik. Elektronički Zbornik Radova Građevinskog Fakulteta
The purpose of the paper is to assess the hydropower potential of the Bednja River for the construction of hydroelectric power plants using turbines that use the potential energy of water and those that exploit the kinetic energy of the watercourse.
Bojan Đurin, Anja Kutnjak
doaj   +1 more source

Middle turbinate osteoma [PDF]

Indian Journal of Otolaryngology and Head & Neck Surgery, 2008
A 14-year-old female patient presented with six months history of progressive nasal obstruction on the left side associated with ipsilateral facial pain. Radiograph of the nose and paranasal sinuses showed a bony mass arising from the left lateral nasal wall.
openaire   +2 more sources

Compressor Diffuser Design Impact on a Microjet Working Line—An Experimental and Numerical Case Study

Aerospace
This study examines the performance of two diffuser configurations—a trumpet-shaped and a semi-diagonal design—for application in micro gas turbine engines, aiming to assess their suitability in terms of efficiency and operational flexibility.
Valeriu Drăgan, Bogdan Gherman, Oana Dumitrescu, Cornel Mihai Tărăbîc, Cristian Olariu   +4 more
doaj   +1 more source

RELIABILITY OF MACHINE ELEMENTS IN WIND TURBINES [PDF]

Fiabilitate şi Durabilitate, 2010
Worldwide electrical energy production generated by wind turbines grows at a rate of 30 percent. This doubles the total production every three years. At the same time the power of individual stations goes up by 20 percent annually.
Willi GRUENDER
doaj  

Experimental Identification of a New Secondary Wave Pattern in Transonic Cascades with Porous Walls

Aerospace
Turbomachinery shock wave patterns occur as a natural result of operating at off-design points and are accountable for some of the loss in performance. In some cases, shock wave–boundary layer (SW-BLIs) interactions may even lead to map restrictions. The
Valeriu Drăgan, Oana Dumitrescu, Mihnea Gall, Emilia Georgiana Prisăcariu, Bogdan Gherman   +4 more
doaj   +1 more source

CFD and Experimental Comparison for Micro-Pump Performance in Space Applications: A Case Study

Applied Sciences
This paper presents a case study comparing CFD predictions with experimental measurements for micropumps, with the goal of evaluating the accuracy and limitations of CFD methods in complex microscale geometries.
Oana Dumitrescu, Cristian Dobromirescu, Valeriu Dragan, Ionut Sebastian Vintila, Radu Mihalache   +4 more
doaj   +1 more source

Investigating the Operational Limits of a Horizontal Axis Wind Turbine Gearbox Through Unsupervised Comparison Between Units of the Same Equipment from Three Nearby Power Plants

Advances in Electrical and Computer Engineering
Considering the operating limits proposed by ISO 10816-21 – Evaluation of Machine Vibration by Measurements on Non-Rotating Parts – for horizontal-axis wind turbine gearboxes, we analyzed the behavior of nearly one hundred gearboxes from three nearby ...
AVILA, S. L., VELLOSO, B. P., CARDOZO, G., MATSUO, T. K.   +3 more
doaj   +1 more source

Test Stand for Microjet Engine Prototypes

Machines
To investigate the functionality and performance of a prototype microjet engine, we constructed a versatile test stand tailored to the specifications of a 400 N prototype.
Cornel Mihai Tărăbîc, Grigore Cican, Cristian Olariu, Gabriel Dediu, Răzvan Marius Catană   +4 more
doaj   +1 more source

Acoustic Analysis of a Hybrid Propulsion System for Drone Applications

Acoustics
This paper aims to conduct an acoustic analysis through noise measurements of a hybrid propulsion system intended for implementation on a drone, from which the main noise sources can be identified for further research on noise reduction techniques ...
Mădălin Dombrovschi, Marius Deaconu, Laurentiu Cristea, Tiberius Florian Frigioescu, Grigore Cican, Gabriel-Petre Badea, Andrei-George Totu   +6 more
doaj   +1 more source