Sökning: "slipstream"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet slipstream.

  1. 1. Optimal Cooperative Platooning Using Micro-Transactions

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Philip Ahl; [2020]
    Nyckelord :platooning; optimal control; dynamic programming; convoy; platoon; scania; micro-transactions; decentralized;

    Sammanfattning : The urge to consume does not seem to stop, thus, the need for transportation of goods will most likely not decrease. At the same time jurisdictions and regulations around greenhouse gas emissions are sharpening and pushing the industry towards a more environmentally friendly state. LÄS MER

  3. 2. Modelling & Analysis of a TiltWing Aircraft

    Master-uppsats, KTH/Flygdynamik

    Författare :Felix Rubin; [2018]
    Nyckelord :;

    Sammanfattning : The aim of this report is the investigation of a hybrid vertical take-off and landing (VTOL) tilt wing aircraft which is in development at the company Dufour Aerospace. Using a model, programmed in MATLAB® different stages of flight can be simulated and investigated. LÄS MER

  4. 3. Accuracy of transient versus steady state forces on a rudder operating in a propeller slipstream

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Erik Löfgren; [2015]
    Nyckelord :Unsteady flows; rudders; propellers; fluid mechanics; performance prediction; unsteady aerofoils;

    Sammanfattning : In computational fluid dynamics (CFD), a transient simulation is in general more costly than computing the steady state of the system, if such a state exists. The velocity field produced by the propeller blades upstream of a rudder is transient in nature, and rudder design using CFD may therefore become very time-consuming. LÄS MER

  5. 4. Numerical study of a wind tunnel setup for measuring train slipstream with Detached Eddy Simulation

    Master-uppsats, KTH/Fordonsdynamik

    Författare :Yogeshwar Dhanabalan; [2013]
    Nyckelord :Train Aerodynamics; Slipstream; Detached Eddy Simulation;

    Sammanfattning : High speed trains have become an integral part of the transportation systems around the world. With increasing speed, very high velocities are generated in the region around the train known as slipstream. Experimental studies have been conducted over the last few decades to study the effect of these phenomena. LÄS MER

  7. 5. Implementation and Analysis of Platoon Catch-Up Scenarios for Heavy Duty Vehicles

    Master-uppsats, KTH/Reglerteknik

    Författare :Pedro F. Lima; [2013]
    Nyckelord :Heavy duty vehicle; platooning; fuel consumption; air drag reduction.;

    Sammanfattning : Heavy duty vehicle (HDV) platooning is currently a big topic both in the academic world and in industry. Platooning is a smart way to solve problems such as safety, traffic congestion, fuel consumption and hazardous exhaust emissions since its concept enables several vehicles to drive close to each other while maintaining all the security requisites. LÄS MER