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DESIGN & ANALYSIS OF INDIVIDUAL EXHAUST SYSTEM FOR IMPROVING
TRANSIENT RESPONSE OF A TURBO DIESEL ENGINEBYISHAN DEV PARIKSHIT
BAJPAI PUSHKAR SHUKLA SANDEEP KR. MISHRAJSS MAHAVIDYAPEETHAJSS
ACADEMY OF TECHNICAL EDUCATION, NOIDADEPARTMENT OF MECHANICAL
ENGINEERING2014-2015IntroductionTurbo-diesel refers to any diesel
engine equipped with a turbocharger.
Turbo-diesels in automobiles offer a higher refinement levels
than their naturally aspirated counterparts.
In power boosting of engines, the application of conventional
turbochargers could realize only a limited improvement because it
is effective in a narrow flow range.
One of the main handicaps of turbocharged diesel engines is
their low dynamic response, in the low speed range, compared with
spark ignition ones.
Improving the dynamic performance of turbocharged diesel engine,
by energy saving in the turbocharger acceleration by engine
performance modelling during transient operation with individual
exhaust configuration.The possible solutions Supplement the usual
exhaust-driven turbo with another turbo driven by an electric
motor.Using variable-nozzle or twin-scroll turbochargersUsing a
turbocharger spool valve to increase exhaust gas flow speed to the
turbine.AFE IntakeExhaust Manifold Remodeling.Our Solution
Remodeling the existing exhaust system as an individual exhaust
manifold in collector configuration.
Objective and Solution OptionsExhaust Manifold Design
Stock Exhaust ManifoldModelled Exhaust Manifold
Fig: Collector Type Exhaust ManifoldFig: Isometric ViewFlow
Analysis of the modelled exhaust manifold.
Number of cells in X26Number of cells in Y12Number of cells in
Z12Total cells47599Fluid cells14920Solid cells16050Partial
cells16629Irregular cells0Trimmed cells0Calculation Mesh Basic Mesh
DimensionsNumber Of Cells
ResultsFlow Analysis: Velocity Variation of a collector style
Flow Analysis: Velocity Variation of a log style
Flow Analysis: Pressure Variation of a collector style Flow
Analysis: Pressure Variation of a log style
Flow Analysis: Temperature Variation of a collector style
NameMinimumMaximumPressure [Pa]71732.21245130.88Temperature
[K]833.44996.23Density [kg/m^3]0.270.87Velocity
[m/s]0632.824Velocity (X) [m/s]-305.485282.075Velocity (Y)
[m/s]-632.436118.746Velocity (Z) [m/s]-180.613377.317Temperature
(Fluid) [K]833.44996.23Vorticity [1/s]21.304136785.185Shear Stress
[Pa]0850.44Relative Pressure [Pa]-29592.79143805.88Heat Transfer
Coefficient [W/m^2/K]00Surface Heat Flux [W/m^2]00Results
SummaryFuture WorkDynamic Analysis taking into consideration the
effect of firing orderDesign optimization by modifying runner
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