Table of Content

High-Speed and High-Temperature Flows

Submission Deadline: 15 January 2020 (closed)

Guest Editors

Doctor Jingying Wang, School of Energy and Power Engineering, Shandong University

Summary

High-speed and high-temperature flows (HSHTF) are of unique significance in many application areas of aeronautics, astronautics, energy and power engineering, etc. In fact, HSHTF problems always involve various complicated physical, chemical, and even multi-field coupling effects, such as shock waves, jets, combustion, and thermo-chemical nonequilibrium, which bring great difficulties to researchers. This special issue aims to highlight all recent theoretical, numerical and experimental advances in the research field of HSHTF. 

This issue will be coordinated by an excellent EI journal, Fluid Dynamics & Materials Processing (FDMP). Both original and review articles on HSHTF are welcomed, including but not limited to the following potential topics: 
1) Supersonic/hypersonic aerodynamic phenomena; 
2) Subsonic/supersonic combustions and propulsion technologies; 
3) Thermal protection systems related to HSHTF; 
4) Shock wave/boundary layer interactions in HSHTF 
5) Transition or turbulence in HSHTF;
6) High-temperature real-gas effects;
7) High-speed or high-temperature rarefied gas flows;
8) High-speed plasma flow and control;
9) New numerical or experimental methods for HSHTF.


Keywords

High-speed and high-temperature flows, compressible, aerodynamics, combustion

Published Papers


  • Open Access

    ARTICLE

    Effects of Wall Emissivity on Aerodynamic Heating in Scramjets

    Yue Zhou, Pengfei Ju
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.6, pp. 1273-1283, 2020, DOI:10.32604/fdmp.2020.09666
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract The effects of the wall emissivity on aerodynamic heating in a scramjet are analyzed. The supersonic turbulent combustion flow including radiation is solved in the framework of a decoupled strategy where the flow field is determined first and the radiation field next. In particular, a finite difference method is used for solving the flow while a DOM (iscrete ordinates method) approach combined with a WSGGM (weighted sum of gray gases) model is implemented for radiative transfer. Supersonic nonreactive turbulent channel flows are examined for a DLR hydrogen fueled scramjet changing parametrically the wall emissivity. The results indicate that the wall… More >

  • Open Access

    ARTICLE

    Numerical Simulation of Fire-Smoke Diffusion Caused by Vehicles in a Tunnel

    Li Lei, Wukai Chen, Huiling Li, Shuai Shi
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.5, pp. 837-856, 2020, DOI:10.32604/fdmp.2020.09631
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract Urban tunnels are generally narrow and fire smoke can hardly diffuse. In the present study, numerical simulation is used to analyze the diffusion of high temperature smoke produced by fire inside a specific tunnel (the Kaiyuan tunnel). The results are compared with similar data relating to other tests to determine the validity of the numerical method. Moreover, the critical velocity obtained by numerical simulation of 5 MW, 20 MW, and 50 MW fires in curved and linear sections of the considered tunnel is compared with the values obtained using empirical formulas. The results show that, for the tunnel ventilation design,… More >

  • Open Access

    ARTICLE

    Shock-Wave/Rail-Fasteners Interaction for Two Rocket Sleds in the Supersonic Flow Regime

    Bin Wang, Jing Zheng, Yuanyuan Yu, Runmin Lv, Changyue Xu
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.4, pp. 675-684, 2020, DOI:10.32604/fdmp.2020.09681
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract Rocket sleds belong to a category of large-scale test platforms running on the ground. The applications can be found in many fields, such as aerospace engineering, conventional weapons, and civil high-tech products. In the present work, shock-wave/rail-fasteners interaction is investigated numerically when the rocket sled is in supersonic flow conditions. Two typical rocket sled models are considered, i.e., an anti-D shaped version of the rocket sled and an axisymmetric slender-body variant. The dynamics for Mach number 2 have been simulated in the framework of a dynamic mesh method. The emerging shock waves can be categorized as head-shock, tailing-shock and reflected-shock.… More >

  • Open Access

    ARTICLE

    Determination of the Circulation for a Large-Scale Wind Turbine Blade Using Computational Fluid Dynamics

    Hao Cheng, Guangsheng Du, Meng Zhang, Kun Wang, Wenbin Bai
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.4, pp. 685-698, 2020, DOI:10.32604/fdmp.2020.09673
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract The determination of the circulation for wind turbine blades is an important problem in engineering. In the present study, we develop a specific approach to evaluate the integral that represents mathematically the circulation. First the potentialities of the method are assessed using a two-dimensional NACA64_A17 airfoil as a testbed and evaluating the influence of different integration paths and angles of attack on the circulation value. Then the method is applied to blades with different relative heights in order to provide useful reference data to be used for the optimization and reverse design of wind turbine blades. As shown by the… More >

  • Open Access

    ARTICLE

    Influence of Diesel Engine Intake Throttle and Late Post Injection Process on the Rise of Temperature in the Diesel Oxidation Catalyst

    Ke Sun, Da Li, Hao Liu, Shuzhan Bai
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 573-584, 2020, DOI:10.32604/fdmp.2020.09591
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract In order to effectively implement DPF (Diesel Particulate Filters) regeneration control, thermal management of exhaust products before and inside Diesel Oxidation Catalyst (DOC) is necessary. In the present study, the Influence of the intake throttle valve and late post injection process on temperature rise inside DOC is analyzed through engine bench tests. The steady experiment results show that adjustment of the intake throttle valve can effectively increase exhaust temperature before DOC; in particular, with intake throttle valve opening at 20%, temperature before DOC can be increased by about 170°C with respect to the full opening. An increase in the late… More >

  • Open Access

    ARTICLE

    Numerical Simulation of Axial Inflow Characteristics and Aerodynamic Noise in a Large-Scale Adjustable-Blade Fan

    Lin Wang, Chunguo An, Nini Wang, Yaming Ping, Kun Wang, Ming Gao, Suoying He
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 585-600, 2020, DOI:10.32604/fdmp.2020.09611
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract Numerical simulation are conducted to explore the characteristics of the axial inflow and related aerodynamic noise for a large-scale adjustable fan with the installation angle changing from −12° to 12°. In such a range the maximum static (gauge) pressure at the inlet changes from −2280 Pa to 382 Pa, and the minimum static pressure decreases from −3389 Pa to −8000 Pa. As for the axial intermediate flow surface, one low pressure zone is located at the junction of the suction surface and the hub, another is located at the suction surface close to the casing position. At the outlet boundary,… More >

  • Open Access

    ARTICLE

    Numerical Study of High-Temperature Nonequilibrium Flow around Reentry Vehicle Coupled with Thermal Radiation

    Jingying Wang, Fangzhou Han, Li Lei, Chunhian Lee
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 601-613, 2020, DOI:10.32604/fdmp.2020.09624
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract Accurate aerodynamic heating prediction is of great significance to current manned space flight and deep space exploration missions. The temperature in the shock layer surrounding the reentry vehicle can reach up to 10,000 K and result in remarkable thermochemical nonequilibrium, as well as considerable radiative heat transfer. In general, high-temperature flow simulations coupled with thermal radiation require appropriate numerical schemes and physical models. In this paper, the equations governing hypersonic nonequilibrium flow, based on a three-temperature model combined with a thermal radiation solving approach, are used to investigate the radiation effects in the reentry shock layer. An axisymmetric spherical case… More >

  • Open Access

    ARTICLE

    Influence of Steam and Sulfide on High Temperature Selective Catalytic Reduction

    Jiyuan Zhang, Linbo Wang, Chengqiang Zhang, Shuzhan Bai
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 615-621, 2020, DOI:10.32604/fdmp.2020.09654
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract The influences of steam and sulfide on the efficiency of NOx reduction using ammonia (NH3) over the nanometer-class V-W/Ti catalyst in conditions of high temperature is experimentally investigated using a steady-flow reactor. The results showed that selective catalytic reduction (SCR) is inhibited by H2O at low temperature, but higher NO conversion efficiency is achieved at high temperature since the reaction of NH3 oxidized by O2 to NOx is inhibited by H2O. The activity of SCR is promoted by SO2 in the temperature range of 200~500° C, the NO conversion efficiency was improved to 98% from 94% by adding SO2. SCR… More >

  • Open Access

    ARTICLE

    CFD-Based Optimization of Hot Primary-Air Pipe Networks in Power Plant Milling Systems

    Qingyun Yan, You Li, Yuanhong Zhu, Kui Cheng, Xueli Huang, Cong Qi, Xuemin Ye
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 623-636, 2020, DOI:10.32604/fdmp.2020.09669
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract A hot primary-air pipe system is the bridge connecting an air-preheater with a coal mill in power generation stations. The effective geometrical configuration of the pipe network greatly affects the air flow distribution and consequently influences the safe and economic operation of milling systems in power stations. In order to improve the properties of the air flow, in the present work the SIMPLEC method is used to simulate numerically the flow field for the original layout of the system. As a result, the internal mechanisms influencing the uneven pressure drop in each branch are explored and three optimization schemes are… More >

  • Open Access

    ARTICLE

    Numerical Investigations on the Impact of Turbulent Prandtl Number and Schmidt Number on Supersonic Combustion

    Yongkang Zheng, Chao Yan
    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 637-650, 2020, DOI:10.32604/fdmp.2020.09694
    (This article belongs to this Special Issue: High-Speed and High-Temperature Flows)
    Abstract The flow field inside the combustor of a scramjet is highly complicated and the related turbulent Prandtl and Schmidt numbers have a significant impact on the effective numerical prediction of such dynamics. As in many cases researchers set these parameters on the basis of purely empirical laws, assessing their impact (via parametric numerical simulations) is a subject of great importance. In the present work, in particular, two test cases with different characteristics are selected for further evaluation of the role played by these non-dimensional numbers: Burrows-Kurkov case and DLR case. The numerical results indicate that these parameters influence ignition location.… More >

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