Jelić, Tin (2015) Zračna mikroturbina sa ejektorom. = Air microturbine with ejector. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Tuković, Željko.
|
Text
Tin_Jelic_Zavrsni_Rad.pdf - Published Version Jezik dokumenta:Croatian Download (999kB) | Preview |
Abstract (Croatian)
U zračnim mikroturbinama s parcijalnim privodom, posebno ako je parcijalni privod manji od ε=0.07, povoljno je sniziti tlak ispred prvog reda statorskih lopatica korištenjem ejektora. Iako miješanje dviju struja u ejektoru ima negativan utjecaj na iskoristivost turbine, povećanjem parcijalnosti turbine zbog smanjenja gustoće i povećanja volumenskog protoka radnog fluida u konačnici bi trebalo rezultirati povećanjem iskoristivosti turbine. U ovom završnom radu proračun ejektora je izvršen analitički s obzirom na ulazne podatke: totalni tlak medija na ulazu u ejektor, brzina strujanja medija na ulazu u ejektor, temperatura medija na ulazu u ejektor, uz pretpostavku kritičnog presjeka na izlazu iz mlaznice. Za proračun turbine korišten je tablični kalkulator Microsoft Excel sa zadanim statičkim tlakom na izlazu iz turbine i stupnjem reaktivnosti turbine uz parametre dobivene iz proračuna ejektora, a u drugom slučaju bez ejektora.
Abstract
Reducing the pressure in front of an air microturbine stator blades using injector is suitable, especially if turbine partial admission value ε is less than 0.07. Although mixing of two flow rates in injector generally reduces turbine efficiency, decreasing of density and increasing of the volume flow is followed with enhancment of partiality which should have a positive influence on turbine efficiency. In this bachelor thesis calculation of injector was done analitically, based on input data: total pressure, static temperature and velocity at the injector inlet, with the assumption that the nozzle outlet section was critical. Calculation of turbine was performed using computer programme Microsoft Excel for two cases: one for turbine with injector, and other for turbine without injector. Both calculations are based on input data: static pressure at the turbine outlet and degree of reactivity.
| Item Type: | Thesis (Undergraduate thesis) |
|---|---|
| Uncontrolled Keywords: | parcijalnost turbine; ejektor |
| Keywords (Croatian): | turbine partiality; injector |
| Subjects: | TECHNICAL SCIENCE > Mechanical Engineering > process energy engineering |
| Divisions: | 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery |
| Date Deposited: | 17 Sep 2015 08:33 |
| Last Modified: | 07 Apr 2020 20:06 |
| URI: | http://repozitorij.fsb.hr/id/eprint/4741 |
Actions (login required)
 |
View Item |
Download Statistics
Download Statistics