Design and Optimisation of Solencer

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DESIGN AND OPTIMIZATION OF EXHAUST SILENCER MUFFLER IN FOUR
STROKE DIESEL ENGINE
M.KANNAN1 S.RAMU2, S.SANTHANAKRISHNAN3 AND M.S.GNANAVEL4
1

Department of Mechanical Engineering, Professor, Adhiaparasakthi Engineering college,

Melmaruvathur, Kanchipuram dt, Tamil Nadu, India. E-mail: kannanlksh@gmail.com 2

Department of Mechanical Engineering, 4Department of Electrical and Electronics Engineering,

Assist Professor, Sri Ramana Maharishi College of Engineering, Cheyyar, Tamil Nadu, India. Email: ramtheraml@gmail.com, E-mail: gnanavel.engg@gmail.com 3

Department of Mechanical Engineering, Lecturer, Shri Sapthagiri Institute of Technology,

Ocheri, Vellore dt, Tamil Nadu, India. E-mail: skskashok@gmail.com ABSTRACT
The environment affected inherent drawback from IC engines is concerned to the major mankind of exhaust noise pollution and air pollution. However the exhaust noise can’t be identified, but the human being affected by without destiny. This paper decided to done the research work depend on the noise pollution for design and construction the muffler and muffler sections. The muffler section has changed but back pressure replied to the engine, might increased and hampered to the engine. The present work done by improving the thermal efficiency and improved the combustion efficiency by exhaust silencer. In addition the performance test and engine efficiency results were compared with existed method in term of brake thermal efficiency and brake specific fuel consumption, temperature measurement of engine performance and drop of pressure measurement these drop of pressure and temperature measurements are observed.

KEYWORDS: Muffler, Silencer, BSFC, BTE
TATA INDICA TURBO MAX TDI BSIV four

INTRODUCTION
There are five different design criteria in
mufflers

design.

These

are

acoustical,

aero

dynamical, mechanical, geometrical and economical
criteria. The acoustical criterion specifies the
minimum noise reduction required from the muffler
as a function of frequency. The muffler used to
controlled the noise level by developing an exhaust
muffler for single largest contribute for overall noise
of engine. Further, developed paper researched from

cylinder diesel engine car was tested under the
measurement or dimension of muffler created in
CATIA,

HYPERMESH

using

FEA

method

NASTRAN software simulated M.Rajasekar reddy et
al.,(1). This paper discussed by CFD approached with
calculation on transfer matrix of engine exhaust
muffler with flow and without flow. The engine
exhaust has measured for noise reduction without
mean flow and further employed the acoustic

performance of muffler flow suggested to predict the

pipe. Due to the discontinuity in the impedance from

acoustic performance and complex mean flow and

the inlet pipe to the expansion chamber of the

without flow able to measure in CFD Lian –yun LIU

muffler, apportion of the incoming wave is reflected

et al.,(2).

back to the source. Hence, pressures measured at

The previous paper discussed about with mean flow
and without mean flow of exhaust noise reduction.
The experiment done by the same mean flow passes

points 1 and 2 in the inlet pipe are resultant of both
the incoming (pi) and reflected (pt) waves and are
given by [3].

through the exhaust outlet. There were created and

P1 = pieikx1 + preikx1

external accessories used to done the noise reduction

P2 = pieikx2 + preikx2

by technical said as the fluctuation in volume. Finally
the active silencer is capable to reduce the exhaust
noise from 91 dBA to 78 dBA after tail pipe outlet
with the back pressure of 3 K pa to engine by

Where p1 and p2 are the pressure valves, x1 and x2 are
the locations of point 1 and point 2 respectively:
The solving equation P1 and P2, obtained equation P i,

R.Boonen.P.sas et al., (3) the presented details are
absorption muffler and compare with the predictions

Pi =...
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