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1

Performance characteristics of panel filters for internal combustion engine inlet air working in a two-stage configuration

Dziubak T.

Journal of KONES

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2018

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Vol. 25, No. 1

83--94

EN

Air filtration conditions in a single-stage and a two-stage filtration system (multicyclone-porous panel filter) are presented. Allowable flow resistance Δpfdop values reducing the air filter service life are specified. The benefits of using a multicyclone as a first stage of air filtration, including improved mobility and extended service life, are discussed. Criteria for selecting the filter media for the automobile air intake system using an absorption coefficient of dust km determined at a specific allowable flow resistance Δpfdop are specified. New methods and conditions to determine the absorption coefficient of dust km for article filter and non-woven fabric filter in a single-stage and a two-stage filtration system are developed and presented. The separation efficiency and separation performance as well as the flow resistance characteristics of the filter set including a single cyclone and a filter element with a specially selected filter medium surface area are tested. Absorption coefficients of dust km for the tested paper filter and non-woven fabric filter were determined for an allowable flow resistance. The effects of dust particle size distribution in the air downstream of the cyclone on reducing the absorption coefficient of dust of the paper filter and non-woven fabric filter in a two-stage filtration system are shown.

2

Potential design improvements of a reverse flow mini-cyclone with a tangential inlet

Dziubak T.

Chemical and Process Engineering

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2018

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Vol. 39, nr 1

15–-31

EN

This paper presents an effect of general dimensions of a reverse flow mini-cyclone with a tangential inlet on its separation efficiency. Several mini-cyclone design modifications are presented and evaluated for use in the air filtration systems of motor vehicles. Local design improvements of three components of a reverse flow mini-cyclone with a tangential inlet D-40 of an air filter fitted in an all-terrain vehicle engine were introduced. An asymmetric curvilinear shape of an outlet port was used instead of a symmetrical shape. An outlet vortex finder inlet port shape was streamlined, and a cylindrical outlet vortex finder of the cyclone was replaced with a conical one. Experimental evaluation of the effects of the design improvements of mini-cyclone on its separation efficiency and performance as well as flow resistance was carried out. Separation efficiency of the cyclone was determined using the mass method as a product of dust mass retained by the mini-cyclone and supplied to the mini-cyclone in a specified time. Separation performance of the cyclone was determined as the largest dust particle dz =dzmax in a specific test cycle in the cyclone outlet air stream. A polydisperse PTC-D test dust used in Poland, a substitute for AC-fine test dust was used. Dust concentration at the mini-cyclone inlet was kept at 1 g/m3. The size and total number of dust particles in the air stream at the outlet of the original mini-cyclone and at the outlet of the improved mini-cyclone was determined using a particle counter.

3

Poprawa skuteczności separacji w cyklonie w wyniku zastosowania przeciwstożka przed wylotem do zasobnika pyłu

Kępa A.

Energetyka

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2008

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nr 11

785-788

PL

Zastosowanie przeciwstożka w cyklonie w prosty sposób może podnieść skuteczność separacji tego urządzenia. Przeciwstożek ogranicza prędkość wirowania gazu w zasobniku i tym samym porywanie wcześniej odseparowanego materiału. Metody numeryczne pozwalają na optymalizację konstrukcji cyklonu.

EN

Application of a counter-cone in a cyclone can easily improve separation efficiency of this appliance. The counter-conelimits a gasswirl speed in the bunker and thus the previously separated material entrainment. Numerical methods enable optimization of cyclone construction.