Sökning: "Ultrasonic velocity"

Visar resultat 11 - 15 av 31 avhandlingar innehållade orden Ultrasonic velocity.

  1. 11. Flow Field and Fibre Fractionation Studies in Hydrocyclones

    Författare :Jonas Bergström; Bo Norman; Mark Martinex; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fibre suspension; fractionation; hydrocyclone; measurement technique; velocity measurement; shear forces; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : Hydrocyclones can be used to fractionate fibres according to their papermaking potential. The obtained fractions typically differ in fibre wall thickness and/or degree of fibre treatment. Despite a multitude of potential application scenarios, the process has so far had little commercial success. LÄS MER

  3. 12. Improved techniques for self-diagnosis of an ultrasonic flow meter

    Författare :Jonathan Berrebi; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Sammanfattning : For both economical and environmental raisons, accurate measurements of energy consumptions are important. The District Heating Industry supplies buildings and private houses of a whole city in hot water through a network. LÄS MER

  4. 13. Determining the quality of natural gas and biomethane : Development of a correlative method and instrument prototype for measuring gas quality

    Författare :Taras Koturbash; Vladimir G. Kutcherov; Andrew R. Martin; Khaled Loubar; KTH; []
    Nyckelord :Natural gas; biomethane; calorific value; Wobbe Index; ultrasonic measurement; sound attenuation; Energy Technology; Energiteknik;

    Sammanfattning : The composition of natural gas highly depends on its origin: natural gas from various deposits, substitute natural gas that can be produced from fossil fuels or renewable sources. The intermixing of gases from various supply sources during pipeline transportation also leads to more complicated and unpredictable gas composition variations at the consumption site. LÄS MER

  5. 14. Ultrasonic flow measurement methods applicable to wet low intensity magnetic separation

    Författare :Jan Stener; Kent Tano; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : In this project the internal material transport processes of wet low-intensity magnetic separation (LIMS) is studied. The aim is to use results from experiments combined with published results to create a base for further research and development. LÄS MER

  7. 15. Material investigations and simulation tools towards a design strategy for an ultrasonic densitometer

    Författare :Jan van Deventer; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Sammanfattning : The purpose of the research described in the thesis has been to improve the accuracy, precision and reliability of an ultrasonic densitometer for liquids in general. Its practical application is a stand-alone device or, in combination with an ultrasonic volumetric flow meter, an all-ultrasonic mass flow meter. LÄS MER