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Research Papers

Study of Bulk-Loaded Liquid Propellant Combustion Propulsion Processes With Stepped-Wall Combustion Chamber

[+] Author and Article Information
Yonggang Yu

School of Energy and Power Engineering,  Nanjing University of Science and Technology, Nanjing, Chinayyg801@mail.njust.edu.cn

Xuexia Chang, Na Zhao, Shanshan Mang, Yanhuang Zhou

School of Energy and Power Engineering,  Nanjing University of Science and Technology, Nanjing, China

J. Appl. Mech 78(5), 051001 (Jul 27, 2011) (8 pages) doi:10.1115/1.4004279 History: Received November 20, 2010; Revised May 23, 2011; Published July 27, 2011; Online July 27, 2011

The multilevel stepped-wall chamber is designed to study the combustion stability control mechanism of the bulk-loaded liquid propellant gun (BLPG). The cold state experiment of the interaction of the high speed gas jet with liquid medium is conducted by means of high speed digital camera system. The simulated small caliber bulk-loaded liquid propellant combustion propulsion device is designed to study the effect of the stepped-wall chamber size on the combustion stability. The experimental results indicate that, the stepped-wall structure can restrain the expansion randomness of the Taylor cavity and leads smooth expansion at each step. In 4 stepped-wall chamber with ΔD/L = 3/40, the interior ballistic performance of BLPG is stable and the consistency of the p-t curves is good. Two-dimensional unsteady model is developed based on the BLPG combustion propulsion experiment. The numerical simulation results coincide well with the experiment.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schema of the experiment apparatus

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Figure 2

The subsequent snapshots of the high-pressure gas expansion in the 3 stepped-wall chamber

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Figure 3

The axial velocity of gas jets in type A and B

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Figure 4

The axial velocity of gas jets in type A and C

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Figure 5

The axial velocity of gas jets in type C and D

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Figure 6

The axial velocity of gas jets in type B and E

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Figure 7

The schema of the simulated launching device

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Figure 8

The p-t curves in cylinder chamber (D = 11 mm)

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Figure 9

The p-t curves in cylinder chamber (D = 12 mm)

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Figure 10

p-t curves in 3 stepped-wall chamber

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Figure 11

p-t curves in 4 stepped-wall chamber

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Figure 12

The density contours in 3 stepped-wall chamber

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Figure 13

The temperature contours in 3 stepped-wall chamber

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Figure 14

The pressure contours in 3 stepped-wall chamber

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Figure 15

Changing of pressure with time

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Figure 16

Velocity vectors in 3 stepped-wall chamber

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