Cook-off test and numerical simulation of AP/HTPB composite solid propellant

Yang, Hongwei; Yu, Yonggang; Ye, Rui; Xue, Xiaochun; Li, Wenfeng

doi:10.1016/j.jlp.2015.11.028

Cited by 18 publications

(2 citation statements)

References 19 publications

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“…The results show that the size and structure of the charge have a great relationship with the absolute value of the cook-off response time and the response temperature of HTPE charge. Yang et al [16] conducted fast and slow cook-off experiments of AP/HTPB charges through a self-designed small cook-off device, and found that the initial cook-off response position of charges under different heat fluxes appeared in the annular region of the charge outer wall near the nozzle. Ye et al [17] did a further study about AP/HTPB charge and found that the influence of different heating rates on charge ignition temperature and ignition delay time cannot be ignored in a certain range.…”

Section: Introductionmentioning

confidence: 99%

Influence of High-temperature Environment on Cook-off Characteristics of Modular Charge

Qian

2023

J. Phys.: Conf. Ser.

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In order to study the heating process of the modular charge loaded into the chamber after the continuous firing of the large caliber gun in the high-temperature environment, a 2D transient cook-off model of the modular charge retained in the chamber was established with cook-off method. When the ambient temperature is 323K and the critical temperature of the inner wall of the gun chamber is 443K, the wall temperature distribution of the gun is solved after 2 rounds/min of continuous firing. Taking this as the initial temperature condition, the cook-off process of the modular charge in the chamber is numerically simulated, and then the cook-off-odd characteristics of the modular charge in the high-temperature environment are analyzed. The results show that after 33 rounds of continuous firing at 2 rounds/min at 323K ambient temperature, the temperature of the inner wall of the gun chamber reaches 442.7K, and the modular charge would have a cook-off response after 107.5s after loading into the chamber, and the response temperature is 483.5K. The initial response position of the modular charge is located at the inner wall of the upper right corner of the module cartridge. The consistency between numerical calculation and experimental results shows that the model could analyze the cook-off problem of modular charge in bore well.

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Section: Introductionmentioning

confidence: 99%

Influence of High-temperature Environment on Cook-off Characteristics of Modular Charge

Qian

2023

J. Phys.: Conf. Ser.

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“…As the ther- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 mal safety of propellant gradually attracted more attention [6][7][8], many scholars experimentally investigated and analyzed the cook-off characteristics AP/HTPB solid propellant. Ho [9], Caro [10] Yang [11] designed small-scale cook-off devices to study the cook-off characteristics of AP/HTPB under the slow heating conditions; Hedman et al [12] employeddifferential scanning calorimetry and thermogravimetric analysis to study the thermal decomposition characteristic of AP/HTPB propellant at 2 K/min.At present, there are few researches regarding the effects of charge size on cook-off characteristics of AP/HTPB propellant. In the actual size of base bleed unit, the structure of AP/HTPB propellant is large and complex.…”

Section: Introductionmentioning

confidence: 99%

Effects of Charge Size on Slow Cook‐Off Characteristics of AP/HTPB Composite Propellant in Base Bleed Unit

2018

Propellants Explo Pyrotec

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To investigate the effects of charge size on the slow cook‐off characteristics of trilobite ammonium perchlorate (AP)/hydroxyl‐terminated polybutadiene (HTPB) composite propellant with slits, a cook‐off model of three‐dimensional base bleed unit is developed based on the two‐step decomposition reaction mechanism of AP/HTPB propellant at the external heating rates from 3.3 to 9 K/h. The charge length of AP/HTPB propellant is 72 mm with 43 mm to 53 mm in grain diameter, and the grain diameter is 43 mm with 72 mm to 90 mm in charge length, respectively. The results show that heating rate and charge size determine the ignition position of AP/HTPB propellant. The effects of charge size on the ignition position and cook‐off temperature are small at the heating rate of 3.3 K/h. As the heating rate increases to 4.6 K/h–6 K/h, with the grain diameter and charge length extending, the ignition position gradually moves from the inner wall to the surface near the slit, meanwhile the cook‐off temperature changes obviously. When the heating rate increases to 9 K/h, the ignition position of AP/HTPB propellant at different charge sizes all occurs on the outer interface between the propellant and slit, there is no obvious influence of different charge sizes on the ignition temperature of AP/HTPB propellant. Additionally, the law of ignition time of AP/HTPB propellant to charge size is the same at different heating rates.

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Study on cook-off behavior of HTPE propellant in solid rocket motor

Li³

2020

Applied Thermal Engineering

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Cook-off test and numerical simulation of AP/HTPB composite solid propellant

Cited by 18 publications

References 19 publications

Influence of High-temperature Environment on Cook-off Characteristics of Modular Charge

Influence of High-temperature Environment on Cook-off Characteristics of Modular Charge

Effects of Charge Size on Slow Cook‐Off Characteristics of AP/HTPB Composite Propellant in Base Bleed Unit

Study on cook-off behavior of HTPE propellant in solid rocket motor

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