3665 KB21 KB201320252017Biluš, IgnacijoKegl, BredaLešnik, LukaMlakar, Nejcletnik:10številka:iss. 3str. 11-23ISSN:1855-5748COBISSID:21056022URN:URN:NBN:SI:doc-TNANXZUVenFakulteta za energetikoJET on-lineJournal of energy technologyair trumpetsdirkalnikengine intake designmotorjinihanje tlakaoptimizacijaoptimizationpressure fluctuationsesalni sistemizračne trobenteThe optimization of a race car intake system| Optimizacija sesalnega sistema dirkalnika|This paper deals with the optimization of a race car intake system in order to increase engine power output. The goal of optimization was to test how different lengths of intake trumpet influence air mass flow, pressure fluctuations and, consequently, the obtained engine-rated power and torque. Six trumpet lengths were tested using the 1-D AVL BOOST simulation program. The obtained numerical results of engine-rated power and torque were compared with the information obtained from the engine's manufacturer. The results of optimization indicate that the length of the intake trumpet significantly influences pressure fluctuation in the test engine intake system. At specific trumpet lengths, pressure fluctuation can help to increase air mass flow per engine cycle, which consequently influences engine-rated power and torque. It was found that shorter intake trumpets have an influence on a higher engine-rated power when operating at higher engine rotational speeds. Longer trumpets increase engine-rated torque at lower engine rotational speeds but decrease engine power at higher speeds. For the needs of competition, high peak engine power is desired, so the trumpets with 60 mm length were selected as optimal, because they have the highest peak engine power output at the desired engine speedPredstavljeni članek obravnava optimizacijo sesalnega sistema motorja z namenom izboljšanja njegove moči. Cilj optimizacije je bil raziskati vpliv dolžine vstopnih cevi (tub) sesalnega sistema na masni pretok zraka, tlačna nihanja, moč in navor motorja. V ta namen smo testirali šest dolžin vstopnih cevi z uporabo 1-D numeričnega programa AVL BOOST. Dobljeni rezultati simulacij so bili primerjani s podatki pridobljeni s strani proizvajalca motorja. Rezultati optimizacije kažejo, da dolžina vstopne cevi pomembno vpliva na tlačna nihanja v sesalnem sistemu testnega motorja. Pri določeni dolžini lahko tlačna nihanja pomagajo izboljšati masni pretok zraka, kar nadaljnjo vpliva na povečanje moči in navora motorja. Iz rezultatov smo spoznali, da krajše dolžine cevi vplivajo na povečanje moči in navora motorja pri višjih vrtljajih. Z uporabo daljših cevi vplivamo na povečanje zmogljivosti motorja pri nižjih vrtljajih in zmanjšanje njegove zmogljivosti pri višjih vrtljajih. Za potrebe tekmovanja potrebujemo večjo moč pri visokih vrtljajih motorja zato smo kot optimalno izbrali cev z dolžino 60 mmTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Mariboru, Fakulteta za energetiko