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Московский государственный университет им. М.В. Ломоносова PowerPoint PPT Presentation


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ЛАБОРАТОРИЯ МНОГОМАСШТАБНОГО МОДЕЛИРОВАНИЯ. Многомасштабное моделирование гетерогенных каталитических процессов на теплозащитных покрытиях космических аппаратов. В.Л. Ковалев. Московский государственный университет им. М.В. Ломоносова. Институт космических исследований РАН,

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Московский государственный университет им. М.В. Ломоносова

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4367163

..

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,

. 11-13 2009


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  • 2. :

  • 3.

  • 4.

  • 5.


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J*q /Jq

1-kw=0 , 2-kw=3 m/s , 3-kw=10 m/s

Mesur


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  • ( )

- ( )

-


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Scott, Kolodziej - Stewart

Zoby, , , ...

Phenomenological Models

Jumper, Willey, Bruno, Deutschmann, Dai, Kurotaki,

,

Billing, Cacciatore, Soyos, , ,

Gro, Holloway-Darling, Whitten-Yang, DePristo, , ,


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:

Mesox


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Space Shuttle

, , , , , ...

Scott, Kolodziej Stewart, Zoby...

D. A. Stewart and D. B. Leiser ;

Kolodziej Stewart


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-

-

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: ( Y.C. Kim, M. Boudart)

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Mesox

M. Balat-Pichelin, .. , A. . , A..

, Mesox

: N2, O2, N2*, O2*, O, Ar


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<<>>

1-k =0, 2-k =3,5 m/s,3-k =

Curves 4-8:


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Space Shuttle

OREX

1,2-Bruno NO NO;

3- NO ; 4,5 Kurotaki NO ,- .


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Scott, Kolodziej - Stewart

Zoby, , , ...

Phenomenological Models

Jumper, Willey, Bruno, Deutschmann, Dai, Kurotaki,

,

Billing, Cacciatore, Soyos, , ,

Gro, Holloway-Darling, Whitten-Yang, DePristo, , ,


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,

:


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:

1. (i = 1, n)

2. (k = 1, N )

:

:

.. , ..


Md trajectories

MD Trajectories

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.

0.82

,

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B cristobalite

SiO2

b cristobalite

Ralph W.G. Wyckoff The crystal structure of the high temperature form of cristobalite (SiO2), American Journal of Science, Ser.5, Vol.9, 1925, pp.448-459

.. , ..


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SiO2

SiO2

.. , ..


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SiO2

SiO2

.. , ..


3c sic

3C-SiC

3C-SiC

.. , ..


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Al 2 o 3

.., .., .., ..

Al2O3

Al2O3.


U r o 3 p al 4 o 6

.., .., .., ..

U(R) O(3P) Al4O6


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, O (3P) Al4O6, - Al2O3.


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  • , MD Trajectory.

  • MD Trajectory , . .. .

  • SiO SiC Al2O3.

  • , . .


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Mars Miniprobe

.. , .. , .. .

CO2

MRSO


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2.7 , 2.8


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r

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n

n

T=80K

P=12atm

T=80K

P=40atm

T=80K

P=60atm

r

r

r

n

T=298K

P=90atm

r


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Expert (ESA)


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-

during

-

((1999),Billing (2000)


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SiO2

, .

.. , ..


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, . .

2 3% .

, .


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(10,10)

n

m

(10,10)


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1.4

x1

x2

(n,n)

.., ..

Y. Ye, C.C. Ahn, C. Witham, B. Fultz, J. Liu, A.G. Rinzler, D. Colbert, K.A. Smith, R.E. Smalley

(10,10)

6-12

10 50

6


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:

H2

C H2

()

.

H2

H2 H2

H2 .

C .


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x1

-

/k, K , A

H2 H2 36.9 2.928

C H2 32.05 3.179

x2

Ea / k = 428 K

Ea

H2

.., ..

r

r

x1

x2

x1

x2

r


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H2

.., ..

- 8-4, :


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z

x

y

.., ..

:

- ,

- , i- j-

  • :

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,


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H2

H2

H2

H2

H2

H2

.., ..

, . , .

:

.., ..


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.., ..

1

2


4367163

r

.., ..

n

n

n

T=80K

P=12atm

T=80K

P=40atm

T=80K

P=60atm

r

r

r

n

T=298K

P=90atm

r


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.., ..

, .

, , .

=>


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.., ..

1 - ,

2 -

3 - ,

4 - Y. Ye, C.C. Ahn, C. Witham, B. Fultz, J. Liu, A.G. Rinzler, D. Colbert, K.A. Smith, R.E. Smalley. (1999)

5 - N. Hu, X. Sun, A. Hsu. (2005)

6 - Lawrence J, Xu Gu (2004)

T=80K

T=298K


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.., ..

0.8

1.0

1.5 V0

0

1.0Tw

0.9 Tw


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.., ..


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(Bird


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