• B. Ashok Chandra
• K. Ravi Putra Vithal
• K. Sandeep Kumar
• Mohammad Vali
• Y. Venkata Rao

Forced chimney draught tends to increase heat transfer from short chimney. Mixed convection along with inner spleen cylindrical pipes decreases the Peclet number and achieve higher Nusselt Numbers thereby increasing the exit velocity. The aspect ratio plays an important role in achieving wider dispersion and lower GCL. AL7075 T6 having high corrosive resistance, high shear and weight bearing capacity is considered for outer core of the chimney cylinders. Convergent angle of 200 is having maximum heat transfer rate. Experimentation is conducted on 400 mm length Al alloy of 40 mm diameter with varied air inlet ranging from 2 m/s to 20 m/s. Temperature v/s distance plot identifies the minimal height of the cylinder for optimal heat transfer under Normal and Forced Convection. Max6675 Thermocouples (K type) are evenly spaced along the cylinder to identify the distribution along the chimney. The sensor data is logged in Ms Excel for easy plotting. The results are intriguing and optimal height of 396 mm at 40 mm diameter. The differential heat transfer observed between natural chimney draught and blower assisted forced convection at 20 m/s is found to be maximum with exit velocity of 8.9 m/s.

Chimney draught, convection, Peclet Number, Rayleigh Number, Nusselt Number, Spleen Pipes

"EXPERIMENTAL INVESTIGATION OF FORCED CONVECTIVE HEAT TRANSFER IN UNLINED SINGLE FLUE CHIMNEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.218-225, May-2019, Available :http://www.jetir.org/papers/JETIR1905F32.pdf

"EXPERIMENTAL INVESTIGATION OF FORCED CONVECTIVE HEAT TRANSFER IN UNLINED SINGLE FLUE CHIMNEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp218-225, May-2019, Available at : http://www.jetir.org/papers/JETIR1905F32.pdf