On the energy efficiency in the heatproof nozzle of the pneumatic pulsator system during supersonic airflow

• Autorzy: Wołosz K. J. , Wernik J.

Identyfikatory

DOI

10.30464/jmee.2018.2.2.155

• Języki publikacji: EN

Abstrakty

EN

In this article, a study of supersonic airflow through a channel with various cross-section is presented. The channel is namely a heatproof nozzle which is used in a pneumatic pulsator system. The system utilizes a pneumatic impact to destructor to avoid of the creation of unfavourable phenomena which comes from cohesion forces. The pneumatic pulsator system is driven by compressed air and a high-velocity airflow is induced by the difference between internal and external air pressure. This flow changes its characteristics during a work cycle of the pulsator from subsonic to supersonic conditions. It causes a very dynamic gas conversion and may produce additional heat inside the pulsator and its nozzle. The article presents a method for calculating the value of the heat which can be generated inside the heatproof nozzle. The results of the study shows that the small amount of energy is lost during the airflow which can generate an increment of heatproof nozzle wall temperature.

Słowa kluczowe

EN

energy efficiency; supersonic airflow; nozzle; transient analysis; pneumatic pulsators

PL

efektywność energetyczna; naddźwiękowy przepływ powietrza; dysza; analiza stanów przejściowych; pulsator pneumatyczny

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2018
• Tom: Vol. 2, No 2
• Strony: 155--161
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr.

Twórcy

autor

Wołosz K. J.

• Warsaw University of Technology, Faculty of Civil Engineering, Mechanics and Petrochemistry, Institute of Mechanical Engineering, Łukasiewicza 17, 09-400 Płock, Poland

autor

Wernik J.

• Warsaw University of Technology, Faculty of Civil Engineering, Mechanics and Petrochemistry, Institute of Mechanical Engineering, Łukasiewicza 17, 09-400 Płock, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).