Research on Time-Dimension Expansion of HBP Model Based on Hydroxyl-Terminated Polybutadiene (HTPB) Propellant Slurry
Yanjun Bai, Jianru Wang, Yifei Feng, Peng Cao, Xiaorui Jiang
TL;DR
This paper introduces a new model to better understand how the viscosity of a rocket fuel slurry changes over time during curing.
Contribution
The study introduces a time-expanded HBP model (HBPW) to capture time-dependent rheological behavior of HTPB propellant slurry.
Findings
The HBPW model accurately captures viscosity changes with shear rate and curing time.
The model shows a minimal 1.7525% discrepancy between simulations and experiments.
The model provides a scientific basis for optimizing propellant formulation and processing.
Abstract
The curing reaction of hydroxyl-terminated polybutadiene (HTPB) solid propellant slurry alters its internal molecular structure, leading to variations in rheological properties. This study investigates the evolution of the rheological behaviour of HTPB propellant slurry during the curing process. Rheological parameters of the slurry at different curing stages were measured using a rotational rheometer, and its time-dependent rheological characteristics were systematically analysed. Building upon the Herschel–Bulkley–Papanastasiou (HBP) viscosity model, a temporal variable was innovatively incorporated to extend the model into the time domain, resulting in the development of the Herschel–Bulkley–Papanastasiou–Wang (HBPW) constitutive viscosity model. Model parameters were determined through experimental data, and the accuracy of the HBPW model was rigorously validated by comparing…
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Taxonomy
TopicsEnergetic Materials and Combustion · Rocket and propulsion systems research · Thermal and Kinetic Analysis