Gradient Heatmetry in a Burners Adjustment

Round 1

Reviewer 1 Report

The paper is scientifically interesting. It takes up the problem of the gradient heatmetry in a burners adjustment.

Please:

- verify the article linguistically,

- insert a literature references (in case of the mathematical formulas taken from the literature),

- determine experimental errors and repeatability of results.

Author Response

    Dear reviewer, we are grateful for all your comments and corrections. All inaccuracies indicated by you are taken into account in the manuscript. Attached is a general response to all your comments.

- verify the article linguistically,

    The manuscript has been checked for syntactical and spelling errors.

- insert a literature references (in case of the mathematical formulas taken from the literature),

    Added missing literature references to formulas:
Benjamin Gebhart. Heat transfer.; McGraw-Hill, 1961, pp. 454.

- determine experimental errors and repeatability of results.

    The standard expanded uncertainty of the heat flux measurement was 7.18%. The corresponding section with the calculation of measurement uncertainty has been added to the text of the manuscript (2.3 Measurement uncertainty).

Reviewer 2 Report

Dear Authors,

You presented interesting and rather original results in your manuscript. In the course of presenting the data, I had some questions and  comments. Please take them into account and make corrections.

1. In formula 4, you give the theoretical equation for the propane combustion in air. Air includes not only oxygen, at a temperature of 2000 ⁰C nitrogen enters into a reaction. This should be commented on.

 

2. In the method of measuring heat fluxes, you use a K-thermocouple (chromel-alumel), this type of thermocouple can be used to measure temperatures up to 1100 ⁰C, and in Figure 13 you show the results according to the color scale up to 1500 ⁰C.

 

 

3. Table 1 shows the incorrect material balance of gas emissions, it does not contain nitrogen oxides (NOx).

Good luck!

Author Response

    Dear reviewer, thank you for your interest and comments on our manuscript. We took note and added to the text of the manuscript all your comments and corrections. Also we have prepared answers to your questions.

1. In formula 4, you give the theoretical equation for the propane combustion in air. Air includes not only oxygen, at a temperature of 2000 ⁰C nitrogen enters into a reaction. This should be commented on.

    During the combustion of a gas torch, under the conditions of our experiment, a temperature of 2000 °C is not reached, therefore, the formation of NOx was not taken into account. In the calculation of the gas combustion reaction, heating of air with a certain amount of oxygen is considered.

2. In the method of measuring heat fluxes, you use a K-thermocouple (chromel-alumel), this type of thermocouple can be used to measure temperatures up to 1100 ⁰C, and in Figure 13 you show the results according to the color scale up to 1500 ⁰C.

    The heat flux was measured using heat flux sensors. A chromel-alumel thermocouple was used to measure the temperature field. The time of proper operation of a thermocouple at such temperatures has been experimentally determined. The thermocouple was placed in an oven at a temperature of 1550°C; under such conditions, the thermocouple operates properly for 150 s. This time is quite sufficient to measure the average temperature in the flame. The temperature measurement time at each point of the flame was 100 s.

 3. Table 1 shows the incorrect material balance of gas emissions, it does not contain nitrogen oxides (NOx).

    The purpose of this study was not to determine the amount of harmful emissions during combustion. The testo 330i gas-analyzer does not allow estimation of the amount of NOx when burning diesel fuel. In further experiments, it is planned to use another gas analyzer with a different configuration of the experimental stand, which will allow us to consider these parameters with high accuracy and in more detail.

Round 2

Reviewer 2 Report

Dear Authors,

You've done a good job on the manuscript, now your work looks more attractive.

Good luck