Utjecaj stlačivosti zraka na letna svojstva zrakoplova

undergraduate thesis

• Title (english): Influence of Air Compressibility on Aircraft Performance
• Author: Ivan Radoš
• Mentor: Andrija Vidović (mentor)
• Committee member: Sanja Steiner (predsjednik povjerenstva)
• Committee member: Matija Bračić (član povjerenstva)
• Committee member: Ružica Škurla Babić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Transport and Traffic Sciences; (Division of Transport); (Department of Air Transport); Zagreb
• Defense date and country: 2019-12-03, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Air Traffic

Abstract

Kao i svaki fluid zrak ima svojstva poput gustoće, tlaka, viskoznosti i stlačivosti. Zrak kao fluid kroz koji zrakoplovi lete ima bitan utjecaj na letna i konstrukcijska svojstva zrakoplova. Definirano je šest vrsta brzina u kojima lete zrakoplovi ovisno o Machovom broju. To su: podzučno (subsonično), zvučno (sonično), krozzvučno (transonično), nadzvučno (supersonično), hiperzvučno (hipersonično). Svojstvo stlačivosti zraka na nižim brzinama je gotovo zanemarivo, dok je na brzinama većim od brzine zvuka vrlo bitno kako za letna svojstva tako za konstrukcijska svojstva zrakoplova. Kako bi zrakoplovi postizali što bolje performanse na brzinama većim od brzine zvuka bilo je potrebno prilagoditi aeroprofil i krila zrakoplova kako bi zrakoplovi što bolje podnosili pojave poput udarnih valova, probijanja zvučnog zida koje se događaju prilikom leta, a uzrokuje ih stlačivost fluida, u ovom slučaju zraka.

Abstract (english)

Like as any fluid, air has properties such as density, pressure, viscosity and compressibility. Air as a fluid through which aircraft fly has a significant impact on the flight structural properties of aircraft. There are six types of speeds which aircraft fly which depends on Mach number. These are subsonic, sonic, transsonic, supersonic, hypersonic. The compressibility o fair at lower airspeeds is almost negligible, while airspeeds above airspeed is very important for flight performance and aircraft structural features. In order to achieve the best performance with aircrafts at speeds higher than speed of sound, it was necessary to adjust the aerofoil and the wings of aircraft in order for the aircraft to withstand phenomena such as shock waves, breaktrough of the sound wall occurring during the flight, and caused by fluid compressibility in this case of air.

• Keywords: fluid; zrak; letna svojstva zrakoplova; stlačivost; brzina zvuka
• Keywords (english): fluid; air; aircraft performance; compressibility; speed of sound
• Language: croatian
• URN:NBN: urn:nbn:hr:119:561133
• Study programme: Title: Traffic and Transport; specializations in: Road Traffic and Transport, Railway Traffic and Transport, Water Traffic and Transport, Air Traffic and Transport, Postal Traffic, Information and Communication Traffic, Urban Traffic and Transport; Course: Air Traffic and Transport; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prometa (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prometa)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-12-11 14:53:00