First, the current author would like to thank everyone who provided comments in Refs. 1,2,3 regarding the results published in Ref. 4. The aim of the paper was to demonstrate capabilities of the 3D Computational Fluid Dynamics (CFD) technique for modelling a Stirling engine.

Questions arising and answers can be grouped into the following points.

Soundness of the original design. From the comments made in Refs. 1,2,3, the authors believe that “soundness” of the original design was lost during the transformation into the alpha machine, together with the fact that the original engine could have improved its performance above that of the modified machine if an error with the piston’s crown had been eliminated.

In addition to the “the gas entrapment” problem, the original engine had also the following shortcomings:...

1.
Burton
,
R.
, 2007, “Discussion: ‘
Design Improvements to a Biomass Stirling Engine Using Mathematical Analysis and 3D CFD Modeling,’ (Mahkamov, K., 2006, ASME J. Energy Resour. Technol. 128, pp. 203–215)
,”
ASME J. Energy Resour. Technol.
0195-0738,
129
, pp.
278
.
2.
Kinnersly
,
R.
, “
Discussion: ‘Design Improvements to a Biomass Stirling Engine Using Mathematical Analysis and 3D CFD Modeling,’ (Mahkamov, K., 2006, ASME J. Energy Resour. Technol. 128, pp. 203–215)
,”
ASME J. Energy Resour. Technol.
0195-0738,
129
, pp.
279
.
3.
Burton
,
J. D.
, “
Discussion: ‘Design Improvements to a Biomass Stirling Engine Using Mathematical Analysis and 3D CFD Modeling,’ (Mahkamov, K., 2006, ASME J. Energy Resour. Technol. 128, pp. 203–215)
,”
ASME J. Energy Resour. Technol.
0195-0738,
129
, pp.
280
.
4.
Mahkamov
,
K.
, 2006, “
Design Improvements to a Biomass Stirling Engine Using Mathematical Analysis and 3-D CFD Modeling
,”
ASME J. Energy Resour. Technol.
0195-0738,
128
, pp.
203
215
.
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