Water Jacket Spacer for Improvement of Cylinder Bore Temperature Distribution

2005 ◽  
Author(s):  
Takashi Matsutani ◽  
Takanori Nakada ◽  
Yoshikazu Shinpo ◽  
Makoto Hatano
Keyword(s):  
Temperature Distribution ◽  
Water Jacket ◽  
Cylinder Bore

Temperature Distribution in a Hollow Cylindrical Workpiece During Machining: Theoretical Model and Experimental Results

1991 ◽  
Vol 113 (4) ◽  
pp. 373-380 ◽  
Author(s):  
G. Subramani ◽  
M. C. Whitmore ◽  
S. G. Kapoor ◽  
R. E. DeVor
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Heat Source ◽  
Analytical Model ◽  
Initial Conditions ◽  
Temperature Response ◽  
Test Facility ◽  
Measured Temperature ◽  
Cylindrical Workpiece ◽  
Cylinder Bore

In this paper, an analytical model is developed for computation of the temperature distribution in a hollow cylindrical workpiece during machining with a single point tool. Such a model is useful for prediction of machined surface error arising from thermal expansion of the workpiece during machining. The model considers the interface between the tool and the workpiece to be a helically moving volumetric heat source. The governing equation satisfied by the temperature field, along with the appropriate boundary and initial conditions, is solved using the method of integral transforms. The experimental test facility used for the conduct of experiments for measurement of the temperature response in a cylindrical workpiece, namely a cylinder bore, during machining is discussed. The results from tests conducted using a laser as a heat source to verify the analytical model for temperature field are then presented. Several cylinder boring tests have been conducted, and the results from these tests along with the analysis performed with the temperature data to calibrate the temperature model are then discussed. Comparisons between predicted and measured temperature response in a cylinder bore during machining show good agreement.

scholarly journals Thermal analysis of end pumped fiber lasers subjected to jacket fluid cooling

2019 ◽  
pp. 311-311
Author(s):  
Haj El ◽  
Han Bani ◽  
Israa Al-Sawafta ◽  
Ahmad Sedaghat ◽  
M. Alshabi ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Fiber Lasers ◽  
Brinkman Number ◽  
Dimensionless Form ◽  
Water Jacket ◽  
Cooling Method ◽  
Radial Heat ◽  
The Common ◽  
Fluid Cooling ◽  
Axial Heat

End pumped lasers are highly efficient lasers particularly in diode lasers using micro lenses. The common cooling method for end-pumped systems is using water jacket or copper tube surrounding the laser rod. In this paper, the temperature distribution within a water jacket and a fiber laser end pumped by a top hat beam is studied analytically. The temperature distribution is obtained by considering the radial heat convection with fully developed laminar flow neglecting the axial heat conduction. The effect of laser dimensions and the Brinkman number on the temperature distribution are presented. The results indicate that the temperature distribution is strongly dependent on the Brinkman number. The results are presented in dimensionless form so that they can be applied to any end-pumped laser rod and fluid types. The main output of this work is that it is better for cooling purposes to have low Br values.

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