Essays about: "Concentric"

Showing result 1 - 5 of 40 essays containing the word Concentric.

  1. 1. Preliminary Design of a 30 kN Methane-Oxygen-powered Electric-Pump-fed Liquid Rocket Propulsion System

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Vikramjeet Das; [2023]
    Keywords : rocket engine; liquid rocket; methalox; electropump; LRPS; LPRE; liquid methane; electric pump feed system;

    Abstract : The design of a liquid rocket propulsion system, unlike that of a standalone system, is intertwined with the overall development of a number of associated systems and is influenced by a multitude of conditions and considerations: from the requirements needed to accomplish the mission to the rationalizations involved behind the development of each rocket system and/or component. In my thesis, the preliminary design of a “new generation” 30 kN rocket engine driven by an electric pump feed system and running on liquid methane and liquid oxygen is performed. READ MORE

  3. 2. Acoustic Characterization of Catalyst

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Surachit Dokson; [2023]
    Keywords : ;

    Abstract : The WHO has set a sound level threshold of 55 dB, beyond which noise is considered harmful to humans when exposed for an extended period of time. It is, however, estimated by the European Environmental Agency that over 110 million people in the EU are regularly exposed to levels of traffic noise above 55 dB. READ MORE

  4. 3. Investigation of MIDEL 7131’s Dielectric Breakdown Strength and Thermal Behaviour : Master Thesis, an experimental study using concentric-like electrodes at elevated temperatures to study breakdowns

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Kim Lin; [2023]
    Keywords : Dielectric strength; High voltage; Liquid dielectric; MIDEL 7131; Electrical breakdown; Temperature cycle; Dielektrisk styrka; Högspänning; Dielektriska vätskor; MIDEL 7131; Elektrisk nedbrytning; Temperaturcykling;

    Abstract : Dielectric insulation are constantly exposed to various stresses, while also being expected to last for long periods of time. Naturally, they degrade with use and in demanding operational environments, this degradation phenomena can be accelerated, leading to costly consequences. READ MORE

  5. 4. Assessment of Lower Limb Muscle Strength: Feasibility and Implementation on Exxentric’s SingleExx Machines

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Maximilian Geisler; [2023]
    Keywords : Force measurement; Lower limb strength; Symmetry assessment; Flywheel-based leg extension machine; Prototype development; Isokinetic dynamometer; Kraftmätning; Styrka i nedre extremiteterna; Symmetribedömning; Flywheel- baserad benförlängningsmaskin; Prototyputveckling; Isokinetisk dynamometer;

    Abstract : Measuring lower limb strength and symmetry is a common practice in elite sports to determine the return to sports point in time during rehabilitation, and this information could be useful for amateur athletes too. However, the devices used for this are highly sophisticated and hardly accessible. READ MORE

  6. 5. Sport specific strength in alpine competitive skiing : What characterizes alpine elite skiers?

    University essay from Gymnastik- och idrottshögskolan, GIH/Institutionen för fysisk aktivitet och hälsa

    Author : Mathias Moberg; [2022]
    Keywords : Alpine Skiing; biomechanics; physiology; strength training; elite athletest; alpine elite skiers;

    Abstract : Introduction: Alpine skiing has changed since the 1990s and it is unclear what sport specific strength is within modern alpine elite skiing. Purpose: The aim of this study was to create a strength profile and to investigate what sport specific strength is within alpine elite skiers. READ MORE