An investigation into the use of a cyclone separator in the intake air system and its influence on the engine performance

2017 ◽  
Vol 232 (5) ◽  
pp. 667-678
Author(s):  
Ali Sakin ◽  
Irfan Karagoz ◽  
Murat Ergul ◽  
Unal Demirtas ◽  
Fatih Hakki Savas
Keyword(s):  
Pressure Drop ◽  
Engine Performance ◽  
Cyclone Separator ◽  
Performance Parameters ◽  
Air Filters ◽  
Air Filter ◽  
Intake System ◽  
Computational Fluid Dynamics Analysis ◽  
Air System ◽  
Air Intake

Filters are used to decontaminate the particles from the outside environment entering different subsystems of vehicles. Conventional air filters can cause a significant pressure drop in the intake air system because of their porous structure. In this study, a cyclone separator was designed and manufactured for the air intake system of an automobile. The pressure drop and the performance parameters of the engine were measured by using a conventional air filter or a cyclone separator in the air intake system. Futhermore, a computational fluid dynamics analysis of the cyclone separator was performed, and the results were compared with the experimental data.

Oil-treated pleated fibrous air filters for motor vehicle engine intake application

2019 ◽  
Vol 234 (2-3) ◽  
pp. 702-713
Author(s):  
Ajay Kumar Maddineni ◽  
Dipayan Das ◽  
Ravi Mohan Damodaran
Keyword(s):  
Pressure Drop ◽  
Motor Vehicle ◽  
Life Time ◽  
Filtration Efficiency ◽  
Air Filters ◽  
Air Filter ◽  
Filtration Performance ◽  
Vehicle Engine ◽  
Air Intake ◽  
The Difference

In this work, oil-treated pleated fibrous air filters were developed, characterized, and evaluated for motorcycle engine intake application. The effect of pleat geometry on the filtration performance was examined. Pleat pitch and pleat height were found to play important roles in determining the filtration efficiency, pressure drop, and dust holding capacity. A pleated fibrous filter prepared with optimum levels of pleat pitch and pleat height showed the best filtration performance. The treatment to the pleated filter by viscous oil yielded remarkably higher dust holding capacity and filtration efficiency, both at cleaned and clogged conditions. A statistical analysis revealed that the weight of oil played a significant role in deciding the filtration performance. The oil-treated pleated filter was installed in a commercial air intake system and its filtration performance was assessed. The filter element displayed a significant delay in evolution of pressure drop during dust loading as compared to the untreated one. However, the difference in filtration efficiency between the oil-treated and untreated filter elements was not found to be too high. Nevertheless, both of them met the standard filtration performance as per the best practices followed by the automotive industry. Overall, the oil treatment to cellulosic filters was found to be highly advantageous for motorcycle application. Practical implications of such air filter system were discussed in terms of service life, fuel consumption, and CO2 emission during filter life time.

Application of Box-Behnken Analysis on the Optimisation of Air Intake System for a Naturally Aspirated Engine

2020 ◽  
Vol 17 (2) ◽  
pp. 8029-8042
Author(s):  
N.S. Mustafa ◽  
N.H.A. Ngadiman ◽  
M.A. Abas ◽  
M.Y. Noordin
Keyword(s):  
Fuel Consumption ◽  
Fuel Efficiency ◽  
Engine Performance ◽  
Fuel Price ◽  
Design Expert ◽  
Intake System ◽  
Analysis Technique ◽  
System Components ◽  
Air Intake ◽  
High Influence

Fuel price crisis has caused people to demand a car that is having a low fuel consumption without compromising the engine performance. Designing a naturally aspirated engine which can enhance engine performance and fuel efficiency requires optimisation processes on air intake system components. Hence, this study intends to carry out the optimisation process on the air intake system and airbox geometry. The parameters that have high influence on the design of an airbox geometry was determined by using AVL Boost software which simulated the automobile engine. The optimisation of the parameters was done by using Design Expert which adopted the Box-Behnken analysis technique. The result that was obtained from the study are optimised diameter of inlet/snorkel, volume of airbox, diameter of throttle body and length of intake runner are 81.07 mm, 1.04 L, 44.63 mm and 425 mm, respectively. By using these parameters values, the maximum engine performance and minimum fuel consumption are 93.3732 Nm and 21.3695×10-4 kg/s, respectively. This study has fully accomplished its aim to determine the significant parameters that influenced the performance of airbox and optimised the parameters so that a high engine performance and fuel efficiency can be produced. The success of this study can contribute to a better design of an airbox.

Application of CFD Methodology to Reduce the Pressure Drop and Water Entry in the Air Intake System of Turbocharged Engine

2008 ◽  
Author(s):  
Shreyas Suhas Joshi ◽  
Vinod Mathews ◽  
Milankumar Nandgaonkar ◽  
Shyam Kajale ◽  
M. Niranjan ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Water Entry ◽  
Intake System ◽  
Air Intake

Comparative Analysis of Various CFBC Cyclone Separator REPDS Profiles

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
N. Prasanna ◽  
R.S. Prakash ◽  
M. Vijayakumar
Keyword(s):  
Pressure Drop ◽  
Circulating Fluidized Bed ◽  
Collection Efficiency ◽  
Cyclone Separator ◽  
Fluidized Bed Combustion ◽  
Reduced Pressure ◽  
Denudation Rate ◽  
Computational Fluid Dynamics Analysis ◽  
Vortex Finder ◽  
Circulating Fluidized Bed Combustion

In the last decade research on CFBC (Circulating Fluidized Bed Combustion Boiler) has been increased but research on cyclone separator has not been paid well attention. All the existing designs of cyclone separator were mainly concentrating on a single parameter that is collection efficiency. But this work mainly concentrates on other parameters like pressure drop and denudation rate. Previous works related to cyclone separator having REPDS (Reduced Pressure Drop Stick) suggest that 50% REPDS in the vortex finder gives the optimum results for all the existing cyclone models. Existing REPDS profile is only circular; we attempted to change the REPDS profile to polygon shapes like square, hexagonal. All the cyclone separators with different REPDS profile have been designed for flow rate of 500m3/hr with operating velocity of 15m/s. CFD (Computational Fluid Dynamics) analysis has been done with operating velocity ranging from 15m/s to 30m/s, using K-€ turbulence model. The results obtained in CFD analysis reveal that there is no much variation in pressure drop, but there is a drastic change in the denudation rate while operating CFBC cyclone separator twice the designed velocity. Thus REPDS can be included in vortex finder of cyclone separator with any polygon profiles as mentioned above.

Experiment and Simulation on Pressure Drop of Pleated Air Filters

2014 ◽  
Vol 960-961 ◽  
pp. 568-573
Author(s):  
Hai Ming Fu ◽  
Yu Fu ◽  
Fang Xu
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Theoretical Calculations ◽  
Unit Length ◽  
Navier Stokes ◽  
Field Variation ◽  
Filtration Process ◽  
Navier Stokes Equation ◽  
Air Filters ◽  
Air Filter

In order to reduce pressure drop of filtration process and increase filtration area, filtration media would usually made into pleated shape. The designs of pleats numbers and pleats height in the unit length have greatly impacted on pressure drop of the filtration process. In this paper, filter pressure drop of pleated air filters were examined by theoretical, experimental and simulation studies. By solving pressure drop from the Navier-Stokes equation on basis of velocity function assumption, by using the concept of average pressure drop in wind gap width, pressure drop in pleated filters was calculated. The numerical simulation of pleated filtration media was developed via using FLUENT software package and flow field variation in gap of pleated media was simulated. The results of theoretical calculations were in agreement with experimental results. It was confirmed that reducing pleat spacing or increasing pleats height could increased the area of filtration media and reduce the overall pressure drop of filters, although structure pressure drop increased. There were best value between pressure drop of pleated air filters and pleat numbers in the unite length. Key words: filtration medium; pressure drop; numerical simulation; air filter; pleated structure

Economical Benefits of Highly Efficient Three-Stage Intake Air Filtration for Gas Turbines

2008 ◽  
Author(s):  
Thomas Schroth ◽  
Michele Cagna
Keyword(s):  
Pressure Drop ◽  
Power Output ◽  
Gas Turbines ◽  
The Other ◽  
Air Filtration ◽  
Air Filters ◽  
Filter Performance ◽  
Other Hand ◽  
Air Intake ◽  
The One

In recent years, users and OEMs of gas turbines are focusing more and more on the quality of the combustion air, since turbo machines have become more sensitive to fouling of the compressor blades. High-quality air filters are able to reduce the fouling on the blades and enable stable power output P and efficiency η. Continuous development of filter media and filter construction have improved the filter performance in the past. Will there be further steps towards even better air filtration for gas turbines or has the development reached a plateau? The answer to this question can be found in an economic analysis taking into account a reduction of fouling due to better combustion air quality on the one hand and higher investment costs and higher pressure drop in the air intake on the other hand. The evaluations and calculations are accomplished at so-called static filter systems where air filters with depth loading characteristics are used. With static filter systems several steps of filtration are arranged in a sequence and therefore the examined upgrades of the filtration efficiencies can be implemented relatively easy so that the effect could be studied. A comparison of two- and three-stage filter systems for intake air filtration at gas turbines produces important findings regarding the most operationally cost-efficient filter sequence overall. The upgrade of the air intake system on the one hand resulted in an increased static pressure loss in the air intake causing reduced turbine efficiency and less power output. On the other hand at the same time the soiling of the blades mainly in the compressor section (compressor fouling) is lowered and as a consequence efficiency and power output are enhanced. The effects of a higher pressure drop entailed by three-stage filtration are compared with those arising from reduced soiling on the blades. In the cases examined, including case studies from actual operation, definite advantages are found for three-stage filtration with the filter sequence F6-F9-H11 in conformity with EN 779 and EN 1822. Even the modification costs for installing another filter stage can be amortized in what will sometimes be significantly less than two years.

scholarly journals A design concept of a device for measuring air flow resistance in vehicle filters

2020 ◽  
Author(s):  
Adrian Misztuk
Keyword(s):  
Flow Resistance ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Air Flow ◽  
Engine Performance ◽  
Internal Combustion ◽  
Design Concept ◽  
Compression Ignition Engine ◽  
Intake System ◽  
Air Intake

Internal combustion engines have to be supplied with adequate amounts of fuel and air. The required amount of fuel and air is determined by the engine controller to guarantee that the fuel reaching the cylinder is burned effectively and that the composition of exhaust gas meets standard requirements. The air supplied to an internal combustion engine has to be adequately filtered because impurities reaching the engine can accelerate the wear of engine components. The air intake system features a filtering partition which captures impurities and prevents them from reaching the engine. However, the filtering process decreases the rate at which cylinders are filled with fresh air, which can compromise engine performance. Therefore, effective solutions are needed to ensure that the flow of filtered air does not significantly decrease the volumetric efficiency of cylinders.  This study presents a design concept of a device for measuring pressure in the air intake system in front of and behind the filtering partition. The proposed device can be useful for measuring filter wear. A prototype of the proposed device was built and tested on several air filters. To eliminate throttle valve impacts, the device was tested in a compression ignition engine. The results of the conducted tests demonstrated that the device correctly measured air flow. The conducted measurements also revealed that the presence of impurities in the air filter induced differences in pressure in the air intake system in front of and behind the filtering partition. The maximum air flow resistance in a clogged filter could be even 100% higher than in a brand new filter. W niniejszej pracy przedstawiono koncepcję stanowiska umożliwiającego prowadzenie pomiarów ciśnienia panującego w kanale dolotowym silnika przed i za przegrodą filtracyjną powietrza, które mogą być przydatne przy określaniu stopnia jej zużycia. Dodatkowo zbudowano prototyp urządzenia i w celu weryfikacji poprawności jego działania przeprowadzono za jego pomocą badania przykładowych filtrów. Badania wykonano z użyciem silnika spalinowego o zapłonie samoczynnym. Wyniki pomiarów potwierdzają działanie urządzenia oraz obrazują zależności pomiędzy filtrami o różnym stopniu zużycia. Okazuje się, że maksymalny opór przepływu zużytego wkładu filtracyjnego może być nawet o ok. 100% większy niż w przypadku nowego wkładu filtracyjnego.

Sign in / Sign up

Export Citation Format

Share Document