IJSRD - International Journal for Scientific Research & Development| Vol. 2, Issue 03, 2014 | ISSN (online): 2321-0613 All rights reserved by www.ijsrd.com 1001 Optimization of Cooling Water Pump By Changing Impeller Blade Angle Using CFD Analysis Maulik B. Patel 1 Professor. K.P. Khamar 2 1 PG Student (I.C. Atomobile) 2 Assistant Professor M.Tech. (Design Engineering) 1 Laljibhai Chaturbhai Institute of Technology, Bhandu, Mehsana, Gujarat, India Abstract--- To study about the behaviour of flow inside the cooling water pump, we done extensive search and gone through number of research papers and blogs. Many researchers carried out their analysis on cooling system components like radiator, coolant, water jackets, fin materials etc. but it is very difficult to find the researcher that works on cooling water pump. Cooling system consist centrifugal pump which is widely used in other industries. After reviewing some research papers on centrifugal pumps we found that most of the problems are related to cavitation and efficiency. Computational Fluid Dynamics (CFD) analysis is one of the advance tool used to understand the behaviour of fluid. A detailed CFD analysis is done to carry out the flow pattern inside the impeller which is an active component of pump. After analyzing some old water pumps of various vehicles we found that major problem that pump is facing is due to cavitation effect on blades at High RPM. This research is aimed to analyze the flow behaviour by modifying the impeller design by choosing blade angle.CFD analysis is done using ANSYS CFX software. Keywords:- Impeller, Blade Angle, Automotive Pump, CFX, Flow Rate, Cavitation, Efficiency I. INTRODUCTION A centrifugal pump is the key part of the automotive cooling system that keep circulates the coolant through the system and takes away the excess heat generated by combustion of fuel inside the engine cylinder. In the centrifugal pump impeller is the key part which circulate the coolant through thorough the pump. However, design and performance prediction process of impeller is still a difficult task. The significant cost and time of the trial-and-error process by constructing and testing physical prototypes reduces the profit margins of the pump manufacturers. Due to this reason CFD analysis is used as advanced tool to design and analyze the flow inside the impeller. Moreover, design modification can be done easily and thus CFD analysis reduces the product development time and cost. This research is carried out the analysis of existing cooling pump of car (Maruti SUZUKI Alto), to improve the efficiency of pump and reduce the cavitation effect inside the pump by changing impeller blade angle. Fig. 1: Construction of Centrifugal Pump II. LITERATURE REVIEW A. M.H. Shojaee Fard And F.A. Boyaghchi : 2007 [1] in this study the centrifugal pump is used to obtain the experiment. Here, three different viscous fluids are used for study and impellers with different outlet angles are used. Centrifugal pump is single axis suction and vane less volute casing and impeller of 208mm outside diameter and with 6 backward curved blades. It is driven by three phase AC electric motor, whose rated power is 5.5 Kw and speed is 1450 RPM. For investigating the influence of blade outlet angles, three impellers with blade outlet angles of 22.5°, 27.5° and 32.5° are manufactured and simulated. Working fluids are special transparent viscous oil refined from crude oils and trap water. They are Newtonian fluids verified by using rotary viscosity meter. The density and kinematic viscosity of the oils are 875 kg/m³ and 43×10^-6 m²/s and 878 kg/m³ and 62×10^-6 m²/s, respectively. The density and kinematic viscosity of the tap water are 1000kg/m³ and 1×10^-6 m²/s, at 20°c, respectively. The pump suction and discharge pressure are measured by pressure gauges and the torque meter is used to measure the shaft torque and speed of the pump. The pump design is shown in below figures Fig. 2: Impeller configurations with blade outlet angle of 27.5° Fig. 3: Impeller configurations with blade outlet angle of 22.5°
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IJSRD - International Journal for Scientific Research & Development| Vol. 2, Issue 03, 2014 | ISSN (online): 2321-0613
All rights reserved by www.ijsrd.com 1001
Optimization of Cooling Water Pump By Changing Impeller Blade Angle
Using CFD Analysis Maulik B. Patel
1 Professor. K.P. Khamar
2
1PG Student (I.C. Atomobile)
2Assistant Professor M.Tech. (Design Engineering)
1Laljibhai Chaturbhai Institute of Technology, Bhandu, Mehsana, Gujarat, India
Abstract--- To study about the behaviour of flow inside the
cooling water pump, we done extensive search and gone
through number of research papers and blogs. Many
researchers carried out their analysis on cooling system
components like radiator, coolant, water jackets, fin
materials etc. but it is very difficult to find the researcher
that works on cooling water pump. Cooling system consist
centrifugal pump which is widely used in other industries.
After reviewing some research papers on centrifugal pumps
we found that most of the problems are related to cavitation
and efficiency. Computational Fluid Dynamics (CFD)
analysis is one of the advance tool used to understand the
behaviour of fluid. A detailed CFD analysis is done to carry
out the flow pattern inside the impeller which is an active
component of pump. After analyzing some old water pumps
of various vehicles we found that major problem that pump
is facing is due to cavitation effect on blades at High RPM.
This research is aimed to analyze the flow behaviour by
modifying the impeller design by choosing blade angle.CFD