1 232 uppsatser · sida 1 av 60
The market for heavy duty engines is constantly requiring engines that should be more and more powerful, while still maintaining low fuel consumption. As a result of increasing engine power, the engine and coolant temperature increases as well due to insufficient cooling …
… this race is the Agilis prototype; a car powered by a uniquely configured HCCI-engine developed at the university. The engine is dependent of several subsystems in order to work properly, among other, systems for cooling and lubrication. Combustion engines are in need of a …
En undersökning av hur Dublin Core används inom fem svenska söktjänster
… how the metadata format Dublin Core is applied within five Swedish search engines. The objects of the investigation are Rättskällan, studera.nu, Svenska miljönätet, Svesök and the web catalogue of Uppsala University. Dublin Core is a flexible and adjustable format, which can be …
Improved afterburner combustion stability for turbofan engine RM12 by modified engine control
The engine of JAS 39 Gripen, RM12, has recently been equipped with a new flameholder and a new engine inlet. This change has caused an increased noise level from the engine when the afterburner is in use. The noise level reaches its peak when the afterburner is partially used …
Förstudie och föreslagna förbättringar av undervisningsjetmotor Turbomin 100
… written at the request of Mälardalens University, Västerås. The aeronautical engineering students at Mälardalens University and the pupils of Hässlö upper secondary school, all gets the opportunity to perform a computation lab with a real turbojet engine during their study. The …
… at Mälardalen University have long performed their lab on a small turbojet engine in the course Aircraft Engine Technology. Since 2011, the engine has been dysfunctional. This was due to lack of maintenance. Since the lab has been an important element in teaching, the University …
En jämförelse mellan företag och forskare
Användning av mjukvaruverktyg när reverse engineering utförs är ett måste för att få ett användbart resultat enligt Hainaut (2002). Kudrass m fl (1997) visar på brister som kan uppstå när mjukvaruverktyg används. Gemensamt för de forskare som har studerats i detta arbete är att …
The Homogeneous Charge Compression Ignition (HCCI) engine is promising in terms of low NO x, low particulates and high efficiency. Due to its homogeneous charge, where the combustion starts almost simultaneously from a number of points in the combustion chamber, only lean …
This thesis applies to a novel steam expander, one part of a steam engine system, a wobble plate engine. The piston in the expander moves axially with the outgoing rotating shaft and is located on a plate, why the engine type is called axial engine. When steam is applied to the …
… Questions included are for example if common operating variables such as engine speed, air-fuel ratio etc. is sufficient to predict engine-out emissions over the engine operating range with good accuracy. Focus was set on the modelling of warm engine, but also the more complex …
<em>En studie om medvetenhet och förebyggande åtgärder mot Social Engineering på svenska organisationer </em>
Abstrakt Social Engineering är konsten att manipulera människor, för att på så sätt vinna deras förtroende. Med hjälp av detta förtroende kan attackeraren sedan kringgå säkerhetssystem och få tillgång till organisationers information. Vi har i denna uppsats genomfört elva …
En processkartläggning på reverse engineering
… business in the presentsituation and has implemented aprocedure for reverse engineering as apart of this work. Reverse engineeringat Alstom is an extensive procedurethat is calculated to be performedunder very time demanding conditions. This thesis is a continued exertion ofthe …
Klarläggande av framtida hållbarhet
… on CO2 emissions are developed, vehicle manufacturers must work to develop new engine solutions to new kinds of fuels to replace fossil fuels. A fuel that could be applied is hydrogen. When hydrogen is combusted only water vapor occurs. Hydrogen is known to be explosive and …
… analyses the difference in performance shown in simulation and verify it by engine test. The initial work was focused on simulation in GT-Power. Investigating how exhaust manifold volume and pulses effects the turbine efficiency and the mean effective pressure during the gas …
… som inte hårdvara eller mjukvara kan stoppa. Detta hot kallas för social-engineering, och det som gör detta hot farligt är att de anställda och chefer i en organisation, kan hjälpa utövaren av socialengineering utan att de själva vet om det. Det går inte att förhindra att dessa …
