Pojave pri prevučenom letu zrakoplova

undergraduate thesis

• Title (english): Occurrences During Aircraft Stalling
• Author: Filip Šokac
• Mentor: Andrija Vidović (mentor)
• Committee member: Igor Štimac (predsjednik povjerenstva)
• Committee member: Maja Ozmec-Ban (član povjerenstva)
• Committee member: Matija Bračić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Transport and Traffic Sciences; (Division of Transport); (Department of Air Transport); Zagreb
• Defense date and country: 2024-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Air Traffic

Abstract

Osnovne aerodinamičke sile koje djeluju na zrakoplov u letu su sila uzgona, otpora,
potiska/vučna sila i težina. One moraju biti u dinamičkoj ravnoteži kako bi zrakoplov ostao u
ustaljenom horizontalnom letu. Povećanje napadnog kuta uzrokuje povećanje sile uzgona do
određene granice nakon koje počinje odvajanje strujnica. Daljnjim povećanjem napadnog kuta
do kritičnog napadnog kuta uzgon više ne raste s povećanjem napadnog kuta te dolazi do
neželjene pojave prevučenog leta. Takav let kao posljedicu ima pojave na strukturi zrakoplova
koje pilotu otežavaju upravljanje, a mogu dovesti i do kovita te dubokog prevučenog leta, a
samim time i do pada zrakoplova. Pojave u pilotskoj kabini zrakoplova daju pilotu jasnu
indikaciju o prevučenom položaju zrakoplova, posebice ako pojave na samoj strukturi nisu
dovoljno jasne što je slučaj kod većih zrakoplova. Na prevučeni položaj značajan utjecaj ima i
oblik krila budući da se pojava odvajanja strujnica na različitim oblicima krila događa na
drugačiji način. Pravovremeno prepoznavanje prevučenog leta te odgovarajuća reakcija
izrazito su važni u sprječavanju neželjenih posljedica.

Abstract (english)

The basic aerodynamic forces acting on an aircraft in flight are lift, drag, thrust and
weight. They must be in dynamic balance in order for the aircraft to remain balanced in steady
horizontal flight. An increase in the angle of attack during the flight causes increased lift up to
the certain point after which flow separation begins to occur. By further increasing the angle
of attack up to the point of critical angle of attack lift no longer increases proportionally with
the angle of attack and phenomenon of stalled flight occurs. As a result, various occurrences
on aircraft structure begin to occur which make it very difficult for the pilot to control and can
lead to deep stalling or spin and ultimately to the fall of an aircraft. Occurrences in the cockpit
give a pilot a clear indication of stalled flight, especially if the occurrences on the structure of
an aircraft are not clear enough, which is the case with larger aircraft. The shape of wing has
a significant influence on the loss of lift, i.e. stall, as the flow separation occurs in a different
way depending on how the wing is shaped. Timely recognition of stall flight and appropriate
reaction are extremely important in preventing unwanted consequences.

• Keywords: sila uzgona; sila otpora; napadni kut; odvajanje strujnica; prevučeni let
• Keywords (english): lift; drag; angle of attack; flow separation; stall
• Language: croatian
• URN:NBN: urn:nbn:hr:119:543230
• Study programme: Title: Transport; specializations in: Road Transport, Rail Transport, Water Transport, Air Transport, Postal Transport, Information and Communication Traffic, Urban Transport; Course: Road 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: 2024-11-29 10:56:31