Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography

• Conjugate heat transfer in a Roots blower. Gap size calibration achieved deviation of 7.5% on flow and 4.3% power. Discharge air temperature was within 4 °C. High speed infrared thermography based surface 6 Oil-free blower is type Positive Displacement Machine used for low pressure ratio applications. Its volumetric efficiency dependent the leakage compressed gas through clearance gaps. In absence internal cooling, prediction distribution conjugate becomes important reliable design operation. The interaction structural deformation highly transient one most challenging problems which need to be addressed accurate performance prediction. To achieve this, technique includes moving transforming mesh employed. test data validation included discharge temperature, mass rate, pressure, comparison between numerical experimental results has shown good agreement flow, power while 4°C. rotor lobe housing temperatures evaluate accuracy Heat Transfer model. difference experiment simulation 6°C. aim this study develop validate model analysis pressurized compressor elements provide elements. By means, operational gap sizes can reliably minimised during machine.