Description: Das Projekt "Infrasound scavenging of aerosols" wird vom Umweltbundesamt gefördert und von European Commission, Joint Research Centre (JRC). Institute for Transuranium Elements (ITU) durchgeführt. Objective: Objective of the work is: To test the feasibility of sonic agglomeration of aerosol particles with low frequency sound. At a frequency of 20 kHz, the attenuation of sound waves in air is about 103 times lower than with 20 kHz, which would open up the possibility of sonic aerosol precipitation over a range of hundreds to thousands of meters. General Information: It is intended to: set up an infrasound source operating at 20 Hz with a power rating of 1 kW in a 170 m3 test chamber. The sound source will be supplied on loan from the company INFRASONIC in Sweden; to measure with this device in operation agglomeration rates of a chemical fog aerosol up to particle concentrations of 106 cm-3 and mass loadings of 1 g m-3; to repeat the above experiments with aerosol created from 5 kg of burning rubber; to inject seed aerosols into the original aerosol (chemical fog and soot) and measure possible enhancements in scavenging. Achievements: The feasibility of sonic agglomeration of aerosol particles with low frequency sound was tested. At a frequency of 20 Hz, the attenuation of sound waves in air is about 103 times lower than with 20 kHz, which would open up the possibility of sonic aerosol precipitation over a range of hundreds to thousands of meters. Preliminary test with a chemical combustion engine (pulse jet) running at a fundamental frequency of 200 Hz were disturbed by secondary effects due to turbulent hot exhaust gases. Nevertheless, measurable agglomeration took place.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Gummi ? Schallquelle ? Europäische Kommission ? Nebenwirkung ? Saatgut ? Schalldämmung ? Transuran ? Schweden ? Tieffrequentes Geräusch ? Abscheider ? Aerosol ? Aerosolabscheidung ? Brand ? Messprogramm ? Messtechnik ? Nebel ? Verbrennung ? Verbrennungsmotor ? Ruß ? Abgas ? Chemikalien ? Chemisches Verfahren ? Energie ? Infraschall ? Luftschall ? Partikelförmige Luftverunreinigung ? Schallausbreitung ? Verbrennungsrückstand ? Chemische Verbindung ? Versuchsanlage ? Turbulenz ? Partikel ? Ballungsraum ? Schall ? Forschungseinrichtung ? Niederschlag ? Eignungsfeststellung ? Abgastemperatur ? Konzentrationsmessung ? Schallanregung ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1992-01-01 - 1992-12-31
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