Computer model of acoustic link in a pipe with a flowing gas medium. Part I: Perturbation of ultrasonic transducer directivity pattern

• Autorzy: Gudra T. , Opieliński K.
• Konferencja: International Symposium on HYDROACOUSTICS AND ULTRASONICS EAA Symposium (formerly 13th FASE Symposium) Gdańsk-Jurata, 12-16 May 1997
• Języki publikacji: EN

Abstrakty

EN

The paper presents an aeroacoustic range equation which makes it possible to elaborate a computer model of ultrasonic link in air for static conditions. The model was made in form of a computer program called KML. Extending the static model, a simulation of uItrasonic wave propagation in a pipeline with flowing air for different profiles of laminar and turbulent flow and different link parameters was performed. The simulation made it possible to work out a computer model of an acoustic link in flowing gas. The model as a computer program can be used to calculate disturbance of ultrasonic beam rays shape and directivity pattem perturbation. Directivity pattem of ultrasonic transmitting transducer, deformed by flowing medium, becomes non-axial symmetric. As a result of the flow, ultrasonic beam rays are curvilinear and the source directivity pattern depends on rectilinearly measured distance.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1997
• Tom: Vol. 1
• Strony: 299--302
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Gudra T.

• Institute of Telecommunication and Acoustics Technical University of Wrocław Poland, 50-370 Wrocław, Wybrzeże Wyspiańskiego 27

autor

Opieliński K.

• Institute of Telecommunication and Acoustics Technical University of Wrocław Poland, 50-370 Wrocław, Wybrzeże Wyspiańskiego 27

Bibliografia

• [1] Bednarek J., Gudra T., Opieliński K., KML 1.0, User's Manual (in Polish), Wrocław 1994,
• [2] Gätke J., Klettke R., Acoustical flow measurement at disturbed profiles, Prace IX Sympozjum z Hydroakustyki, Jurata 1992, pp.113-117,
• [3J Gudra T., Opieliński K., Computer model of ultrasonic link in air (in Polish), Akustyka Molekularna i Kwantowa, Gliwice 1995, V.16,
• [4] Gudra T., Opieliński K., Computer model of aeroacoustic link (in Polish), Prace XLII Otw. Sem. z Akustyki, Białowieża 1995, pp. 149-154,
• [5] Makarewicz R., Sound in Enviroment (in PoIish), OWN, Poznań 1994.