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Special Issue "Advanced Research on High-Energy Performance Compressors"

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "E: Thermal Management".

Deadline for manuscript submissions: 31 July 2022 | Viewed by 1253

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Special Issue Editors

Prof. Dr. Jianmei Feng
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Guest Editor

Department of Compressor Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: positive displacement compressor; flow and heat transfer; multiphase flow; hydrogen energy; hydrogen pump and air compressor in FCV; ejectors; gas liquid separation; gas pulsation and piping vibration

Prof. Dr. Zhongguo Sun
E-Mail Website
Guest Editor

Department of Fluid Machinery and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: computational fluid dynamics with meshless methods; theory and experimental study of the flow in fluid machinery; micro fluid machinery and complex flow in fluid engineering; ocean science, technology and engineering

Special Issue Information

Dear Colleagues,

Driven by global carbon reduction targets, compressors as a heavy consumer of energy will face many opportunities and challenges. It is urgent to research and develop more energy-saving and innovative products. Thus, relevant fundamental and practical research is necessary. The aims and topics of this Energies Special Issue on “Advanced Research on High-Energy Performance Compressors” cover all cutting-edge studies on various compressors in different applications, including refrigeration fields, heat pumps, nature gas fields, gas gathering and transportations, hydrogen utilization, oil and gas exploitation, etc.

The following topics, among others, are included in this issue:

Numerical simulation and experiments in compressors;
High-pressure hydrogen compressors for hydrogen refueling stations;
Large compressors for gas storage and transportation;
Carbon dioxide compressors for new energy vehicles;
High-performance compressors for fuel cell vehicles;
Energy saving technologies and applications on compressors;
Intelligent fault diagnosis system and noise control methods for compressors.

Prof. Dr. Jianmei Feng
Prof. Dr. Zhongguo Sun
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

numerical simulation
transient flow
energy saving
hydrogen utilization
BOP of fuel cell system
high performance
high speed

Published Papers (3 papers)

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Research

Open AccessArticle

Application of CFD Method to Investigate the Evolution of the Thermodynamic Parameters of a Hyper Compressor and Its Pipelines

and

Energies 2022, 15(12), 4452; https://doi.org/10.3390/en15124452 - 18 Jun 2022

Abstract

Hyper compressors are key facilities for producing the low-density polyethylene with discharge pressure up to 350 MPa. Such high pressure brings great challenges to the design of the hyper compressor in many aspects. In this paper, a 3D transient computational fluid dynamics (CFD) model with inlet and outlet pipelines is built to investigate the thermodynamic performance of a hyper compressor. To realize the interaction between the thermodynamic processes and the pressure pulsation through valve dynamics, the pressures across the valve surfaces were monitored to the dynamic equation of the poppet valve. Then, structured grids were generated for the flow domain inside the valve, and the entire numerical model was solved by a commercial code: ANSYS Fluent. Consequently, the p-V diagram, the valve motion and pressure pulsation could be acquired simultaneously. The results of the numerical model showed that the exponents of the expansion and compression processes were 5.12 and 13.22, which were much larger than the common compressor. The maximal pressure pulsations were 13.25% and 22.07%, which occurred in the suction and discharge chambers, respectively. Severe flutter happened during the opening process of the suction valve due to the high incompressibility of the ethylene. Full article

(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors)

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Open AccessArticle

Numerical Investigation on the Performance of a Transonic Axial Compressor with Inlet Distortion and Low Reynolds Number

and

Energies 2022, 15(10), 3612; https://doi.org/10.3390/en15103612 - 15 May 2022

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Abstract

The performance and stability of the transonic fan stage with a nonuniform inflow is a key issue in aero engine operation, and the coupling of inlet distortion and low Reynolds numbers at high altitude creates more severe challenges to aero engines. This work used computational methods to explore the performance and stability of a transonic fan stage with inlet distortion and a low Reynolds number. To investigate this issue, the transonic fan stage NASA stage 67 with a 180° total pressure distortion at a low Reynolds number was selected as the test case. Full-annulus 3D unsteady simulations were conducted to reveal the details of the flow field under coupling conditions. The computational results under different conditions were analyzed and showed that the coupling effect was not linearly stacked with single factors. The low Reynolds number in the coupling case thickened the boundary layer on the blade surface, and, on the one hand, the profile loss in the hub region increased. On the other hand, the structure of shock wave was converted in the tip region, which increased the shock loss significantly. In addition, the variation in the shock wave structure reconstructed the pressure distribution on the blade surface, allowing the fluid to migrate to the tip region, which affected the tip flow structure and ultimately delayed the stability boundary. Full article

(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors)

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Open AccessArticle

Experimental and Numerical Analysis of Rotor–Rotor Interaction Characteristics inside a Multistage Transonic Axial Compressor

Jiayi Zhao

Qingfei Lu

and

Dangguo Yang

Energies 2022, 15(7), 2627; https://doi.org/10.3390/en15072627 - 03 Apr 2022

Cited by 1 | Viewed by 467

Abstract

Serving as a key component of the core engine, the high-load axial compressor is expected to have high performance, which determines several critical parameter levels of the aero-engine. The unsteady effect on the performance induced by the interaction among different rotors should not be ignored during the design of a high-load compressor. The interaction between R1 (the first rotor row) and R2 (the second rotor row) rotors of a transonic axial compressor was measured in detail using high-frequency pressure fluctuation sensors, aiming to reveal the evolution and distribution characteristics of the R1 sweep effect inside the R2 passage. The results show that near choke and design points, the interaction between the R1 oblique shock wave at the leading edge and the high-pressure region on the blade pressure side triggers the R1-2BPF (blade passing frequency) disturbance, which is different from the traditional harmonic of the blade wake disturbance. A ‘long tail’ flow structure, which indicates the major influence of the R1 shock wave, fluctuation obviously reaches the exit of R1 and influences the upper part of S1 and R2. The combination of the R1-2BPF and the R1-1BPF (mainly caused by the R1 wake disturbance) influences the R2 flow field significantly, and both of them sharply grow at the middle and rear parts of the R2 passage where the strength of the two disturbances increases by 24% and 68%, respectively, compared to the leading edge of R2. Moreover, the circumferential non-uniformity of the R1-1BPF and R1-2BPF disturbances significantly increase at some locations of the R2 passage compared to the R1 exit, which is attributed to the relative clocking positions of the R1 and R2 blades. Full article

(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors)

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