Experimental study on the thermodynamic characteristics of the high temperature hydrocarbon fuel in the cooling channel of the hypersonic vehicle

Li, Haowei; Qin, Jiang; Jiang, Yuguang; Zhou, Weixing; Bao, Wen; Huang, Hongyan

doi:10.1016/j.actaastro.2018.11.021

Cited by 16 publications

(3 citation statements)

References 35 publications

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“…As a result, the dynamic characteristics of the flow and heat transfer processes of uncracked hydrocarbon fuels are significant and warrant further study. The cooling channels serve as a heat exchanger, with them being curved inside the combustor wall, and fuel flows through them as a coolant [15]. Owing to the significance of the convective heat transfer coefficient, extensive research has been conducted in this area.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet

Xu,

Lin,

et al. 2024

Applied Sciences

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Regeneratively cooled scramjets are successfully used as propulsion devices in hypersonic vehicles. During operation, scramjets experience acceleration. This special process causes a dynamic flow process, and heat transfer in the cooling channel commonly occurs, which may cause hazards and control difficulties for scramjets. A dynamic numerical model with a modified heat transfer coefficient calculation method was established to study the transient flow and heat transfer processes in a cooling channel. The dynamic characteristics of the flow and heat transfer under different conditions were calculated and are discussed, including the changes in the inlet fuel mass flow, heat flux, and pressure working conditions. The results indicate that the stable time of the cooling channel outlet fuel temperature is related to the rate of change in the inlet mass flow and heat flux. The stable time of the outlet fuel temperature under decreasing heat flux working conditions was approximately 12.5 s. These results summarize the dynamic flow and heat transfer characteristics, which are significant for designing cooling channels in scramjets.

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Section: Introductionmentioning

confidence: 99%

Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet

Xu,

Lin,

et al. 2024

Applied Sciences

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“…Compared to liquid hydrogen and liquid natural gas, HED hydrocarbon fuel has a high energy density and relatively stable physical properties and can be stored in a wide temperature range [23]. Furthermore, HED hydrocarbon fuel has an additional chemical heat sink, which can be used for the thermal protection of the wall of the combustor and nozzle [24][25][26]. The high-temperature hydrocarbon-fueled turboexpander was originally applied to regenerative active cooling in the scramjet engine.…”

Section: Introductionmentioning

confidence: 99%

Feasibility and Performance Analysis of High-Energy-Density Hydrocarbon-Fueled Turboexpander Engine

Gao,

Kang,

Sun

et al. 2023

Aerospace

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With the in-depth research on hypersonic aerodynamics and hypersonic propulsion technology, humans are growing closer to space travel. Recent studies have shown that the pre-cooled air-turborocket (ATR) or turboexpander engines are some of the potential propulsion methods for reusable space vehicles and single stage-to-orbit (SSTO) missions because they have a high specific impulse at low Mach numbers, which can overcome the problem of the “thrust gap” in turbine-based combined-cycle (TBCC) engines. The ATR engine needs an additional oxidizing agent and the turboexpander engine usually uses hydrogen as fuel, which has low energy density and poor safety. To address this problem, this paper proposed a high-energy-density (HED) hydrocarbon-fueled turboexpander engine, and its feasibility has been proven through a simplified thermodynamic model. Through detailed thermodynamic analysis based on the energy and pressure balance, this paper analyzed the performance characteristics of the engine to evaluate its capacity to work in a wide speed range at low Mach numbers. The results show that the endothermic hydrocarbon-fueled turboexpander engine has good specific impulse in Mach 0∼4 at an equivalence ratio of 0.7∼1.3, and the turboexpander engine can be combined with the dual-mode scramjet and become an efficient acceleration method for SSTO missions and the reusable spacecraft.

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“…According to the characteristics of the wall temperature distribution in a slender channel, the heat transfer of hydrocarbon fuel can be divided into four stages: normal heat transfer, heat transfer enhancement, heat transfer deterioration, and the second heat transfer enhancement, among which the heat transfer enhancement is the most important stage. The cooling channel in a scramjet combustion wall can be regarded as a heat exchanger between the fuel and combustion [8]. Due to the importance of the convection heat transfer coefficient, much research has been conducted on it.…”

Section: Introductionmentioning

confidence: 99%

Overall Heat Transfer Coefficient Evaluation Method for Uncracked Hydrocarbon Fuel in a Regeneratively-Cooled Heat Exchanger of a Scramjet

Lin

et al. 2022

Applied Sciences

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Regenerative cooling is critical for the thermal protection of hypersonic propulsion systems, wherein the flow and heat transfer characteristics of the hydrocarbon fuel in the cooling channel are crucial. Restricted by measurement, the distribution of the fuel temperature inside the cooling channel cannot be directly detected. As a result, the measurement of the convective heat transfer coefficient is more an overall heat transfer coefficient. Furthermore, the existing overall heat transfer coefficient calculation method is derived without considering the flow state of the hydrocarbon fuel in the cooling channel, which should be taken into consideration. Therefore, a modified calculation method of the overall heat transfer coefficient is proposed in this study. The results of the characteristics of the turbulence-related parameters show that the overall heat transfer coefficient is mainly determined by the effective thermal conductivity and surface convective heat transfer coefficient, which are related to the fuel temperature and flow state. Furthermore, the existing method might overestimate the overall heat transfer coefficient. The modified method is suitable for the calculation of the overall heat transfer coefficient in the heat transfer enhancement process in a cooling channel.

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Experimental study on the thermodynamic characteristics of the high temperature hydrocarbon fuel in the cooling channel of the hypersonic vehicle

Cited by 16 publications

References 35 publications

Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet

Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet

Feasibility and Performance Analysis of High-Energy-Density Hydrocarbon-Fueled Turboexpander Engine

Overall Heat Transfer Coefficient Evaluation Method for Uncracked Hydrocarbon Fuel in a Regeneratively-Cooled Heat Exchanger of a Scramjet

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