Utjecaj realnih uvjeta poletno-sletne staze na duljinu polijetanja

undergraduate thesis

• Title (english): Influence of runway realistic conditions on take-off distance
• Author: Matej Kurtak
• Mentor: Milan Vrdoljak (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-03-03, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Aviation, Rocket and Space Technology

Abstract

Cilj ovog rada je analizirati utjecaj realnih uvjeta poletno-sletne staze na duljinu polijetanja zrakoplova i usporediti rezultate s onima dobivenim u idealnim uvjetima. Opisan je prošireni model gibanja središta mase koji je korišten u numeričkom proračunu. Zatim su opisana svojstva zrakoplova MiG-21 korištenog u analizi. Prikazani su rezultati duljine polijetanja na idealnoj stazi koji su kasnije korišteni za usporedbu. Analizirane su duljine polijetanja na stazama s različitim pozitivnim i negativnim konstantnim nagibom. Potom su razmatrane tri staze s promjenjivim nagibom. Analiza je provedena i na modelu stvarne staze koja zbog utjecaja reljefa mijenja nagib. Također je razmotren utjecaj početne mase zrakoplova na duljinu polijetanja. Duljina polijetanja izračunata je na idealnoj i stvarnoj stazi u vrućoj i hladnoj nestandardnoj atmosferi i u standardnim atmosferskim uvjetima za usporedbu. Na kraju su numerička rješenja uspoređena s analitičkim rješenjem za ravnu stazu. Analitički je analiziran i utjecaj vjetra na duljinu polijetanja.

Abstract (english)

The goal of this paper is to analyse the influence of realistic runway conditions on take off distance and to compare results with those obtained in ideal conditions. Description of modified point-mass model used in numerical calculation is given. Properties of analysed aircraft MiG-21 are also described. The results of take off distance on ideal runway are shown and they are later used for comparison. Furthermore, take off distances are analysed on runways with constant positive and negative slopes. Three runways with variable slopes are then examined. Also, analysis is conducted on a model of a real runway which has a variable slope due to uneven terrain. In addition, influence of the initial mass of the aircraft on take off distance is studied. Take off distance is calculated on ideal and real runway in hot and cold non-standard atmospheres and in standard atmospheric conditions for comparison. In conclusion, numerical results are compared with analytical solutions for a flat runway. Influence of wind on take off distance is also analytically assessed.

• Keywords: MiG-21; duljina polijetanja; nagib staze; model materijalne točke; nestandardna atmosfera
• Keywords (english): MiG-21; take off distance; runway slope; point-mass model; non-standard atmosphere
• Language: croatian
• URN:NBN: urn:nbn:hr:235:935900
• Study programme: Title: Aeronautical Studies; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zrakoplovnog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka zrakoplovnog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-02-28 13:34:03