A novel pulse-adaption flow control method for a turbocharger turbine: Elastically restrained guide vane

Wang, Zhi‐Hui; Ma, Chaochen; Zhang, Hang; Zhu, Fengxiao

doi:10.1177/0954406220908623

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Overall, the test and simulation of the swallowing capacity were in good agreement with each other and had a maximum error value of 2.62% at the speed of 150,000 rpm, which was within the acceptable range. This discrepancy was attributed to the simplification of the secondary feature in the geometry, the parameter settings for heat transfer in the simulation, and a manufacturing error [45,46]; moreover, it could be influenced by the optimal application scope of the SST model [47].…”

Section: Model Validationmentioning

confidence: 99%

A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve

Yin

Fan

et al. 2022

Sustainability

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Turbochargers have evolved with the advancement of engine technology. In this study, we pro-posed a concept of joint operation, based on the operating characteristics of the compressor and turbine. Furthermore, a turbine evaluation method was proposed based on this concept, and an optimization application study of the turbine impeller blade number and turbine casing was con-ducted and verified. The results showed that the performance evaluation method based on the joint point could predict the optimization trend of turbine performance more accurately, the turbine output power optimized based on our new method evidently had advantages over the original turbine, and the joint point showed better overall performance. The original single-entry turbine could be optimized into a 9-blade twin-entry turbine having better response characteristics. The maximum torque of the optimized engine was 5.4% higher than that of the original engine, and the minimum brake specific fuel consumption (BSFC) was reduced by 2.1%. In the low and medium speed operating region, engine torque was increased by up to 3.2% and BSFC was reduced by up to 1.1% compared to the turbine optimized by conventional methods. Hence, the optimization effect of our new method was proven.

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Section: Model Validationmentioning

confidence: 99%

A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve

Yin

Fan

et al. 2022

Sustainability

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“…In the recent papers, 9,10 we proposed a novel self-adaptive regulation mechanism named “elastically restrained guide vane (ERGV)” for the turbocharger turbine inlet to simplify the complex regulatory mechanism of the traditional VGT, thereby reducing the cost and allowing the replacement of standard VGT under some special situations. The ERGV is a special type of VGT.…”

Section: Introductionmentioning

confidence: 99%

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes. Part II: Experimental evaluation

Wang

Huang

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The current paper presents the performance results of a variable-flow turbocharger turbine, called the ‘elastically restrained guide vane (ERGV)’ turbine, which is intended to provide an improvement over the current state-of-the-art turbochargers, namely the variable geometry turbocharger (VGT). This paper is a continuation of the previous work and concentrates on the experimental testing of the ERGV turbine performance, as well as the corresponding effects on the mass flow characteristic as a result of operating the turbocharger in its ERGV mode compared with its operation as a traditional VGT. The effects of the ERGV application are demonstrated through the first experimental testing. In this preliminary attempt, the range of the mass flow rate is effectively enlarged, the new mass flow characteristic lines can pass through the two and three lines separately of the original turbine for the two spring stiffness operations. The results of the this study were encouraging with respect to the potential of ERGV to replace the traditional VGT in particular applications. Additionally, this paper compares the experimental mass flow charateristics with the computational fluid dynamics (CFD) simulations in the radial turbine at the conditions of two spring stiffness. This preliminary comparison between numerical simulation and experimental data shows encouraging results.

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“…Despite the importance of this developed secondary flow injection system which allowed a 24% increase in the output torque, a further study is needed on this injection system taking into account the actual thermodynamic properties of the engine combustion products. Wang et al 16 suggested a novel system, so-called elastically restrained guide vane, as a replacement of the classical vane mechanism of VGT turbines. They modeled their system with a set of fluid-structure interaction simulations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

Ketata

Driss

2022

International Journal of Engine Research

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The turbine, an enabling component of turbochargers, is a seat of highly complex unsteady flow as well as varying gas compositions between diesel and gasoline engines. Thus, it is necessary to take into account different physical models when simulating such turbines. Researchers have often considered the turbine working gas as air, which may not lead to an accurate prediction of actual turbine characteristics. In the present work, the effect of the working gas on the performance of turbocharger turbines as well as on the turbo lag was investigated through a set of numerical simulations for six wastegate opening degrees from 0% up to 100% and under a wide range of the flow pulse frequency ranging from 33.33 up to 166.66 Hz. Four working fluids were involved in this study which are the gasoline burnt gas, diesel burnt gas, air with like gasoline engine waves, and air with like diesel engine waves. The performance of the turbine and its responsiveness quantified as the time lag with burnt gases from both diesel and gasoline engines were compared to those with air. Results showed totally deviated unsteady performance characteristics compared to the turbine working with air. Results also confirmed that considering the working fluid as air may not lead to a fair representation of the actual turbine performance characteristics. The findings of this work put emphasis on the importance of the gas composition when modeling such turbines by engineers especially during the design process where a good turbocharger-engine match has to be met.

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A novel pulse-adaption flow control method for a turbocharger turbine: Elastically restrained guide vane

Cited by 5 publications

References 22 publications

A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve

A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes. Part II: Experimental evaluation

Analysis of performance and time lag of turbocharger turbines fed with gasoline and diesel burnt gases and air under pulsating flow conditions

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