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Article
Flow Loss Mechanism in a Supercritical Carbon Dioxide Centrifugal Compressor at Low Flow Rate Conditions
With the advantages of high efficiency and compact structure, supercritical carbon dioxide (sCO2) Brayton cycles have bright prospects for development in energy conversion field. As one of the core components of ...
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Chapter and Conference Paper
Equivalent Thermal Conductivity Improvement of Stator Winding and Thermal Benefit for Air-Cooled Electrical Aviation Machine
Electrical machines with high power density are key enabling components of propulsion systems for flying cars. Air cooling system is widely utilized for electrical aviation machine for its compact and reliable...
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Article
Real-Time Instability Detection of Centrifugal Compressors Based on Motor Speed Measurements
Flow instability in the centrifugal compressor should be detected and avoided for stable and safe operation. Due to the popularity of electric centrifugal compressors, instability detection could be achieved b...
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Article
Characterization of Swirling Inflow Effects on Turbine Performance under Pulsating Flows
The present study focuses on the influence of the swirling flows on flow behaviors and performance of a radial-flow turbocharger turbine under pulsating inflow condition. To characterize the effects of swirlin...
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Article
Performance Improvement of a Centrifugal Compressor for the Fuel Cell Vehicle by Tip Leakage Vortex Control
Heightened interests have been laid at the preliminary design and optimization of the centrifugal compressor for the fuel cell vehicle. The centrifugal compressor for fuel cell vehicle is driven by a high-spee...
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Article
Thermal Performance of a Micro Heat Pipe Array for Battery Thermal Management Under Special Vehicle-Operating Conditions
The thermal management of battery systems is critical for maintaining the energy storage capacity, life span, and thermal safety of batteries used in electric vehicles, because the operating temperature is a k...
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Article
Numerical study of a two-stage turbine characteristic under pulsating flow conditions
With developments of turbo-compounding and two-stage turbocharging technologies, two-stage turbine is increasingly applied in automotive engines. This paper numerically investigates the characteristic of a two...
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Article
Adaptive flow optimization of a turbocharger compressor to improve engine low speed performance
To improve the engine overall performance, an adaptive flow optimization procedure is proposed in this paper to synthesize turbocharger compressor optimum designs. Two objective functions are involved in the a...
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Article
An investigation on the performance of a Brayton cycle waste heat recovery system for turbocharged diesel engines
A Brayton cycle waste heat recovery (WHR) system for turbocharged diesel engines was proposed and the performance of a diesel engine integrated with the proposed system was investigated. The waste heat recover...
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Article
Effects of Reynolds number on the performance of a high pressure-ratio turbocharger compressor
The effects of Reynolds number on the performance of a high pressure-ratio turbocharger compressor were investigated by both experiments and numerical simulation. The experimental results show that the pressur...
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Article
Effects of pulse flow and leading edge sweep on mixed flow turbines for engine exhaust heat recovery
Recovery of heat energy from internal combustion engine exhaust will achieve significant road transportation CO2 reduction. Turbocharging and turbogenerating are most commonly used technologies to recover engine ...
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Article
An integrated turbocharger design approach to improve engine performance
Turbocharging technology is today considered as a promising way for internal combustion engine energy saving and CO2 reduction. Turbocharger design is a major challenge for turbocharged engine performance improve...
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Chapter and Conference Paper
Through Flow Models for Engine Turbocharging and Exhaust Heat Recovery
Transportation represents over 30% of energy consumption and 20% to 25% of the carbon dioxide (CO2) release in the atmosphere, and the shares of which tend to increase. Energy consumption and CO2 emission of engi...
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Article
Numerical simulation of three-dimensional gas/liquid two-phase flow in a proton exchange membrane fuel cell
Investigation into the formation and transport of liquid water in proton exchange membrane fuel cells (PEMFCs) is the key to fuel cell water management. A three-dimensional gas/liquid two-phase flow and heat t...
