is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: https://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/12049 To cite this version :Pierre LEQUIEN, Gérard POULACHON, José OUTEIRO, Joël RECH -Hybrid experimental/modelling methodology for identifying the convective heat transfer coefficient in cryogenic assisted machining -Applied Thermal Engineering p.14 -2017Any correspondence concerning this service should be sent to the repository This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Hybrid experimental/modelling methodology for identifying the convective heat transfer coefficient in cryogenic assisted machining ABSTRACTCryogenic assisted machining has become a very popular method in the metal cutting industry, as it enables the cooling of a cutting zone for improving surface integrity or/and tool life without contaminating the machined part. However, the thermal interaction between liquid nitrogen (LN 2 ) and a hot cutting zone remains unclear. The main objective of this work is to analyse the thermal phenomena occurring at the LN 2 jet/workpiece interface. The nitrogen liquid/gas phase proportion has a significant influence on the heat transfer. To determine the influence of LN 2 jet parameters on the convective heat transfer coefficient, a model based on the projection of an LN 2 jet on a workpiece instrumented with thermocouples is proposed. The most influential parameters of the thermal distribution and heat transfer coefficient are LN 2 pressure, nozzle diameter, projection angle and the distance between the nozzle and the workpiece surface.

No abstract

No abstract