27105

احتراق نانوذرات سه گانه

كارشناسي ارشد

مهندسي مكانيك

1399

1401/7/10

مهدي بيدآبادي

مهندسي مكانيك

ﺳﻮﺧﺖ ﻫﺎي ارﮔﺎﻧﯿﮏ، از ﺟﻤﻠﻪ ﻻﯾﮑﻮﭘﻮدﯾﻮم، ﭘﺘﺎﻧﺴﯿﻞ ﺑﺎﻻي آزادﺳﺎزي اﻧﺮژي دارﻧﺪ، ﺑﺎاﯾﻦ ﺣﺎل، ﺑﻪ ﻣﻨﻈﻮر اﻓﺰاﯾﺶ اﻧﺮژي آزاد ﺷﺪه در ﻓﺮاﯾﻨﺪ اﺣﺘﺮاق اﯾﻦ دﺳﺘﻪ از ﺳﻮﺧﺖ ﻫﺎ، ﭘﯿﺸﻨﻬﺎد ﻣﯽ ﺷﻮد ﮐﻪ از اﻓﺰودﻧﯽ ﻫﺎﯾﯽ ﭼﻮن ﻓﻠﺰات اﺳﺘﻔﺎده ﺷﻮد. ﺑﻪ ﻫﻤﯿﻦ ﺟﻬﺖ در ﺗﺤﻘﯿﻖ ﺣﺎﺿﺮ، ﺳﻮﺧﺖ ﺳﻪ ﮔﺎﻧﻪ ﻻﯾﮑﻮﭘﻮدﯾﻮم، آﻫﻦ و آﻟﻮﻣﯿﻨﯿﻮم ﻣﻮردﻣﻄﺎﻟﻌﻪ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. در اﯾﻦ ﭘﺎﯾﺎن ﻧﺎﻣﻪ، اﺑﺘﺪا ﻣﺪل ﺳﺎزي اﺣﺘﺮاق ﺣﺪي ﺳﻮﺧﺖ ﻫﺎي ﺳﻪ ﮔﺎﻧﻪ، ﻻﯾﮑﻮﭘﻮدﯾﻮم، آﻟﻮﻣﯿﻨﯿﻮم و آﻫﻦ ﺑﺮرﺳﯽ ﻣﯽ ﺷﻮد. در اﯾﻦ ﺑﺨﺶ، ﺑﻪ ﺑﺮرﺳﯽ ﺗﻌﺎدل ﺗﺮﻣﻮدﯾﻨﺎﻣﯿﮑﯽ و ﺗﻐﯿﯿﺮات ﮐﺴﺮ ﺟﺮﻣﯽ ﺳﻮﺧﺖ ﭘﺮداﺧﺘﻪ ﺷﺪه اﺳﺖ. ﺳﭙﺲ، ﻣﺪل ﺳﺎزي ﻧﯿﻤﻪ ﺣﺪي ﺳﻮﺧﺖ ﻫﺎي ﺳﻪ ﮔﺎﻧﻪ، ﻻﯾﮑﻮﭘﻮدﯾﻮم،آﻟﻮﻣﯿﻨﯿﻮم و آﻫﻦ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﻣﯽ ﮔﯿﺮد. در اﯾﻦ ﻣﺪل ﺳﺎزي، اﺛﺮ ﭼﺮﺧﺶ ﻣﺠﺪد ﺣﺮارت ﺑﺮ دﻣﺎ، ﺳﺮﻋﺖ و ﺟﺒﻬﻪ ﺷﻌﻠﻪ، ﻣﻮردﻣﻄﺎﻟﻌﻪ ﻗﺮار ﻣﯽ ﮔﯿﺮد. در ﻗﺪم ﺑﻌﺪي، اﺛﺮ ﺗﺸﻌﺸﻊ ﺷﻌﻠﻪ ﺑﻪ ﻣﺪل ﺳﺎزي اﺣﺘﺮاق ﻧﯿﻤﻪ ﺣﺪي اﺿﺎﻓﻪ ﻣﯽ ﮔﺮدد و اﺛﺮات آن ﺑﺮ دﻣﺎ، ﺳﺮﻋﺖ و ﺟﺒﻬﻪ ﺷﻌﻠﻪ، در ﺣﺎﻟﺖ ﺣﻀﻮر ﺗﺸﻌﺸﻊ و ﻋﺪم ﺣﻀﻮر آن، ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﻣﯽ ﮔﯿﺮد. ﻫﻤﭽﻨﯿﻦ، ﺟﻬﺖ ﺑﺮرﺳﯽ ﻧﺤﻮه ﺣﺮﮐﺖ ذرات ﺳﻮﺧﺖ و ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻮﺛﺮ ﺑﺮ ﻧﯿﺮوي ﺗﺮﻣﻮﻓﻮرﺗﯿﮏ، ﻣﺴﯿﺮ ﺣﺮﮐﺖ ذرات ﺑﺎ اﺳﺘﻔﺎده از دﯾﺪﮔﺎه ﻻﮔﺮاﻧﮋي ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﻣﯽ ﮔﯿﺮد. در ﻧﻬﺎﯾﺖ، اﺣﺘﺮاق ﻧﻮﺳﺎﻧﯽ ﺳﻮﺧﺖ ﺳﻪ ﮔﺎﻧﻪ، ﺟﻬﺖ ﺑﺮرﺳﯽ ﺗﺎﺛﯿﺮ ﻗﻄﺮ، ﻧﺴﺒﺖ ﻫﻢ ارزي و دﻣﺎ اوﻟﯿﻪ ﺑﺮ ﻧﻮﺳﺎﻧﺎت دﻣﺎ ﺷﻌﻠﻪ، ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﻣﯽ ﮔﯿﺮد. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ، ﺑﺎ ﮐﺎﻫﺶ ﻗﻄﺮ از 30 ﺑﻪ 10 ﻣﯿﮑﺮوﻣﺘﺮ، ﺳﺮﻋﺖ ﺷﻌﻠﻪ از 0/051 ﺑﻪ 0/153 ﻣﺘﺮ ﺑﺮ ﺛﺎﻧﯿﻪ اﻓﺰاﯾﺶ ﻣﯽ ﯾﺎﺑﺪ. ﻫﻤﭽﻨﯿﻦ، ﺑﺎ اﻓﺰاﯾﺶ ﻗﻄﺮ از 500 ﺑﻪ 700ﻧﺎﻧﻮﻣﺘﺮ، ﺟﺒﻬﻪ ﺷﻌﻠﻪ ﺑﻪ ﻣﮑﺎﻧﯽ ﺑﺎﻓﺎﺻﻠﻪ 1/46 ﺑﺮاﺑﺮ دورﺗﺮ ﻣﻨﺘﻘﻞ ﻣﯽ ﺷﻮد. ﺑﺎ اﻓﺰاﯾﺶ دﻣﺎي ﻣﺤﯿﻂ از 300 ﺑﻪ 700 ﮐﻠﻮﯾﻦ، ﺑﯿﺸﯿﻨﻪ داﻣﻨﻪ ﻧﻮﺳﺎﻧﺎت دﻣﺎ، 1/33 ﺑﺮاﺑﺮ ﮐﺎﻫﺶ ﻣﯽ ﯾﺎﺑﺪ.

1401/07/18

Combustion of Triple Nanoparticles

1/1/1900 12:00:00 AM

Organic fuels, including lycopodium, have a high potential for energy release, however, in order to increase the energy released in the combustion process of these fuels, it is suggested to use additives such as metals. Therefore, in this research, the triple fuel of Lycopodium, iron and aluminum has been studied. In this thesis, firstly, the modeling of the limit combustion of triple fuel, lycopodium fuel, aluminum fuel and iron fuel is investigated. In this section, thermodynamic balance and fuel mass fraction changes have been investigated. Then, the semi- limit combustion modeling of triple fuel, lycopodium fuel, aluminum fuel and iron fuel is investigated. In this modeling, the effect of heat recirculation on temperature, speed and flame front is studied. In the next step, the effect of flame radiation is added to the semi-limit combustion modeling and its effects on temperature, speed and flame front are investigated in the presence and absence of radiation. Also, in order to investigate the movement of fuel particles and the parameters affecting the thermophoretic force, the movement path of the particles is investigated using the Lagrangian point of view. Finally, the fluctuating combustion of triple fuel is investigated in order to investigate the effect of diameter, equivalence ratio and initial temperature on flame temperature fluctuations. According to the results, by reducing the diameter from 30 to 10 micrometers, the flame speed increases from 0.051 to 0.153 m/s. Also, by increasing the diameter from 500 to 700 nm, the flame front is moved to a place with a distance of 1.46 times farther. As the ambient temperature increases from 300 to 700, the maximum range of temperature fluctuations decreases by 1.33 times.

ﺳﻮﺧﺖ ﭼﻨﺪﮔﺎﻧﻪ , اﺣﺘﺮاق ﻧﺎﻧﻮذره , آﻫﻦ , ﻻﯾﮑﻮﭘﻮدﯾﻮم , آﻟﻮﻣﯿﻨﯿﻮم

Multiple fuel , nanoparticle combustion , iron , lycopodium , aluminum

Mohammad Mohebbinia

Mehdi Bidabadi