Analysis of Upstream Turbulence Impact on Wall Heat Transfer in an Acoustic Liner with Large-Eddy Simulations

Round 1

Reviewer 1 Report

The authors presented a numerical simulation of the  upstream turbulence impact on wall heat transfer in an acoustic liner with Large-Eddy Simulations. In addition, they performed an experimental study to validate the numerical model.

The main findings are to be mentioned in the abstract.

The novelty of the paper is to be stated at the end of the introduction.

The expressions of the wall shear and convective heat transfer coefficient are to be added.

The authors considered the turbulent regime, what is the considered range for Reynolds number?

For the numerical study:

-        The solved governing equations are to be presented.

-        The boundary conditions are to be expressed mathematically.

-        Have you solved time dependent or independent equations.

-        The used turbulence model is to be justified.

-        Have you neglected or considered the buoyancy effect?

-        What is the convergence criterion?

-        More details about the numerical method are to be provided.

-        Is the used software FVM or FEM based?

-        A figure presenting the used mesh is to be presented.

-        A grid sensitivity test is to be performed.

For the experimental study:

-        The experimental setup is to be described with more details.

-        An actual photo presenting the experimental setup is to be added.

-        More details on the measurement technique and data acquisition system are to be provided.

-        An experimental uncertainty study is to be performed.

The discussion is generally good, but can be improved by adding more physical interpretations of the results.

 

Author Response

Please find the answer to reviewer in the attached document

Sincerely

Florent 

Author Response File: Author Response.pdf

Reviewer 2 Report

1.What is the main difference between the temperature PDFs in the laminar and turbulent cases?

2.What is the reason for the lower temperature peak in the turbulent case compared to the reference case?

3.How does upstream turbulence affect the wall heat transfer coefficient h?

4.What is the effect of upstream turbulence on the heat transfer coefficient between the jets compared to the jet axis?

5.What are the two main mechanisms that drive the flow in the present study?

6.Does neglecting the upstream turbulence strongly affect the numerical results?

7.How does the velocity ratio M affect the importance of the upstream conditions regarding the jets?

8.The English grammar and structure can be improved in some places for better clarity.

Author Response

Please find the answer to reviewer in the attached document

Sincerely

Florent 

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Accept as it is.