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Hybrid Energy Systems and the Logic of Their Service-Dominant Implementation: Screening the Pathway to Improve Results

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Energy engineering 2023年第6期120卷 1307-1323页

作者： Halyna Bielokha Leonora Chupryna Sergey Denisyuk Tatiana Eutukhova Oleksandr Novoseltsev National Technical University of Ukraine“Kyiv Polytechnic Institute” Kyiv03056Ukraine 2Institute of General Energy of NAS of UkraineKyiv03150Ukraine 3Interregional Academy of Personnel ManagementKyiv02000Ukraine

The transition of the global economy to a low-carbon development path has led to dramatic changes in the organization and functioning of energy markets around the world,where hybrid energy systems(HESs)are one of the decisive active *** the same time,a number of problems facing the modern HESs are primarily due to the stochastic nature of the renewable energy they use,require further profound changes not only in the technologies they use and how they manage them,necessary to meet the needs of end consumers and interact with the unified energy system,but also to preserve the ability of the environment to *** order to make the process of changes more efficient and eco-deep,the article proposes to use and discusses the approach based on service dominant(SD)logic,which opens up new opportunities for solving the problems of *** of all through:the implementation of closer service interaction with other participants in the energy markets,as well as with the environment;a systemically organized process of transforming the“product”economic activity of HESs into a service-dominant one;developing the generalized and engineering models for solving the problems of optimizing the technical and economic indicators of HESs,operation in steady-state and transient *** calculations confirm the effectiveness of the proposed approach and its ability to reduce the average daily costs for the system as a whole by 14.7%compared to the costs with a uniform distribution of power between the modules.

关键词： Hybrid energy systems service-dominant logic generalized model engineering calculations

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Calculation of Aerodynamic Characteristics of Hypersonic Vehicles Based on the Surface Element Method

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Advances in Aerospace Science and Technology 2022年第2期7卷 112-122页

作者： Tianqiang Huang Guoyi He Qi Wang Nanchang Hangkong University Nanchang China

A program for calculating the aerodynamic properties of hypersonic vehicles based on the surface element method was developed using the general-purpose programming language C++. The calculated values of lift coefficients, drag coefficients, and surface pressure coefficients are discussed with the results of wind tunnel experiments using the HL-20 lift body and the NASA hypersonic aircraft STS Columbia OV-102 as research subjects. Finally, the results of the experimental and wind tunnel studies of the aerodynamic characteristics of the HL-20 lift body at an altitude of 65 km and Mach numbers of 6 and 10 Ma are discussed. The maximum error in the aerodynamic characteristics at 6 Ma does not exceed 3%, consistent with the results. The maximum error at 10 Ma occurs in the 11° - 14° angle of attack and does not exceed 10%, which is still within the error tolerance. The STS results for NASA’s hypersonic aircraft were also tested using this procedure. Experimental aerodynamic data for the Colombian OV-102 aircraft. The results show that the program takes only 10 minutes to calculate the results, with no more than 2% error from the wind tunnel experimental results.

关键词： Surface Element Method Hypersonic Vehicle C++ Aerodynamic Characteristics engineering calculations

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