Study on Dynamic Burning Rate Equation of Propellant

Zhang, Ruihua; Rui, Xiaoting; Wang, Yan; Li, Chao

doi:10.1002/prep.201700021

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…sonic Method [17][18][19][20][21][22][23]. Furthermore, the application of laser and photography techn [24][25][26][27] provides added avenues for measuring the transient burning rate.…”

Section: Test Systemmentioning

confidence: 99%

“…To validate steady-state and unsteady-state burning theories of solid propellants, researchers have focused on measuring the transient burning rate. Several techniques have emerged as effective means of testing the transient burning rate of solid propellants, including the Microwave Method [13][14][15][16] and the Ultrasonic Method [17][18][19][20][21][22][23]. Furthermore, the application of laser and photography techniques [24][25][26][27] provides added avenues for measuring the transient burning rate.…”

Section: Introductionmentioning

confidence: 99%

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Using the Impulse Method to Determine High-Pressure Dynamic Burning Rate of Solid Propellants

Liu,

Wang,

et al. 2023

Aerospace

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A new method for determining the burning rate of a solid propellant, called the Impulse Method, is proposed in this paper. It is based on the proportional relationship between the impulse generated and the mass of the burned propellant. The pressure–time and thrust–time curves are obtained from a tubular propellant grain burning in the chamber, whose inner surface serves as the initial burning surface. Consequently, the mass of the propellant that was burned off at different pressures can be determined, and the burning rates at different pressures are derived according to the geometric parameters of the propellant grain. The Impulse Method was applied to test the burning rate of two types of propellants twice. The results show that the burning rates were consistent for the same propellant at corresponding pressures, demonstrating the feasibility and reliability of the Impulse Method. The burning rate of a GAP-based composite propellant at 20 MPa measured using the Standard Motor Method was 22.6 mm/s, and that measured using the Impulse Method was 22.2 mm/s and 22.7 mm/s, respectively. These findings indicate that the two methods have comparable accuracy. However, the Impulse Method has the advantage of obtaining the burning rate of the solid propellant at any pressure through a single test. In addition, the nozzle erosion only affected the pressure and not the burning rate. Finally, the rationality of the approach for determining the actual specific impulse was proven by comparing the results with those from another testing method.

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“…sonic Method [17][18][19][20][21][22][23]. Furthermore, the application of laser and photography techn [24][25][26][27] provides added avenues for measuring the transient burning rate.…”

Section: Test Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using the Impulse Method to Determine High-Pressure Dynamic Burning Rate of Solid Propellants

Liu,

Wang,

et al. 2023

Aerospace

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“…The impact resistance performance has always been a necessary topic in the research of high-energy propellants, which is directly related to the launching safety of high-performance artillery and other barrel weapons [1][2][3][4][5][6]. The main factors determining the impact resistance of propellant are the formula and processing technology.…”

Section: Introductionmentioning

confidence: 99%

Study on a Method to Determine the Transverse Impact Strength of Propellants Based on Impact Absorbing Energy

Liu

Zhang

et al. 2021

Propellants Explo Pyrotec

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In this paper, a measurement method of the transverse impact strength of propellant based on the initial fracture impact absorbing energy in the drop weight impact test is proposed. According to the relationship between load and time, displacement was deduced. The correctness and reliability of the displacement were confirmed by comparing it with the displacement by the digital image correlation method (DIC). Combined with a high-speed camera, the impact process image was collected, and the initial fracture point was determined by the load-displacement curve. Then the impact absorbing energy corresponding to the initial fracture point was obtained by integrating the displacement with a load. The transverse impact strength of the propellant can be acquired based on the initial cross-sectional area of the sample. By comparison, it is found that the coefficient of variation and dispersion degree of the measurement results by the proposed method at low and room temperature are significantly less than those by the traditional pendulum test. That is, the consistency and repeatability of the proposed method are better. The result proves the feasibility and reliability of the method based on the initial fracture impact absorbing energy to measure the transverse impact strength of propellants.

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“…With the development and replacement of artillery, greater demands are being placed on the muzzle velocity of projectile, bore pressure, and charge density of propellants. On the premise, launch safety must be given full attention with the breakthroughs of gun propellant formulation and charge technology [1][2]. The mechanical property is a very important aspect for studying the launch safety of gun propellants, particularly the impact resistance of propellant at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Method to Determine the Impact Strength of Triple‐Base Gun Propellant Based on Strain Energy Density

Liu

Zhao

et al. 2020

Propellants Explo Pyrotec

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A method to obtain the impact strength of triple‐base gun propellant is proposed according to strain energy density. Using a drop‐weight impact testing machine, the impact strengths of DAGR125‐21/19 gun propellant at room temperature (20 °C) and low temperature (−40 °C) were studied. In the experiments, there were different impact energies via changing the drop weight or height. The surface images of gun propellants during the impact process were captured using a high‐speed camera. The deformation of DAGR125‐21/19 gun propellant was calculated through digital image correlation method (DICM). After analyzing the surface images and deformation, it was found that there was a good agreement between the maximum of axial nominal strain energy density (ANSED) and initial fracture point. Finally, the impact strength of DAGR125‐21/19 gun propellant was obtained through calculating the strain energy density during the plastic stage between the yield and initial fracture points. Moreover, successive parallel and replication experiment results proved the rationality and feasibility of the proposed method to determine the impact strengths of DAGR125‐21/19 gun propellant at room temperature (20 °C) and low temperature (−40 °C).

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Study on Dynamic Burning Rate Equation of Propellant

Cited by 5 publications

References 8 publications

Using the Impulse Method to Determine High-Pressure Dynamic Burning Rate of Solid Propellants

Using the Impulse Method to Determine High-Pressure Dynamic Burning Rate of Solid Propellants

Study on a Method to Determine the Transverse Impact Strength of Propellants Based on Impact Absorbing Energy

Method to Determine the Impact Strength of Triple‐Base Gun Propellant Based on Strain Energy Density

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