Vol.2, No 5, 2003 pp. 269 - 283
UDC 582.951; 663.973
PHYSICAL PARAMETERS OF THE VENTILATED FILTER CIGARETTE
O. D. Đurđanović, Lj. A. Miljković
Faculty of Sciences and Mathematics, University of Niš, Niš, SCG
Abstract. The main physical parameter of all ventilated filter cigarettes is the filter ventilation. It has been known for many years that these cigarettes have a possibility to achieve major reductions in all noxious smoke components, including those in the gas phase, and that filter ventilation is a practical tool for controlling smoke deliveries. The term filter ventilation in this case describes the supply of diluting air to the main-stream smoke via the ventilated cigarette filter. Smoking of a lit cigarette is a nonlinear dynamic process, and filter ventilation depends on the interrelationship between a number of factors. Fortunately, the total ventilation measured on an unlit cigarette during constant and standard air flow at mouth end is somewhat lower than for a lit cigarette.
It was shown that linear models used here make it possible to estimate filter ventilation degree for various commercial unlit cigarettes from nondestructive pressure measurements and geometrical data.
Key words: ventilated filter cigarette, filter ventilation, air flow, pressure
FIZIČKI PARAMETRI VENTILIRANE FILTER CIGARETE
Glavni fizički parametar svih ventiliranih filter cigareta je ventilacija preko filtera. Odavno je već poznato da se ove cigarete odlikuju najvećim sniženjem svih štetnih komponenata dima, uključujući i one u gasnoj fazi, kao i da je filter ventilacija praktičan 'alat' za kontrolu oslobodjenih komponenata dima. Izraz 'filter ventilacija' opisuje dovod razredjujućeg vazduha u glavnu struju dima preko ventiliranog cigaretnog filetra. Pušenje upaljene cigarete je nelinearan dinamički proces u kome filter ventilacija zavisi od brojnih faktora i njihovih medjuzavisnosti. Srećom, ukupna ventilacija merena na neupaljenoj cigareti tokom konstantnog standardnog protoka vazduha na njenom pušačkom kraju je nešto niža od ventilacije upaljene cigarete.
Pokazano je da linearni modeli, korišćeni ovom prilikom, omugućavaju procenu stepena filter ventilacije za različite komercijalne neupaljene cigarete samo na osnovu nedestruktivnih merenja pritisaka i geometrijskih podataka.
Ključne reči: ventilirana filter cigareta, ventilacija filtra, vazdušni protok, pritisak.