The problem of wind aerodynamics is solved. The experiment in a small wind tunnel was performed. The graphs of the pressure coefficients Cp on angle of attack have been determine. Significant microclimatic processes have been established.

This work is devoted to the problem of studying the energy efficiency of buildings, in particular - the definition of infiltration losses. The article presents the main methods for determining infiltration, which are presented in SP 50.133330.2012 and GOST R 55656-2013. However, the infiltration of air through the building envelope depends largely not only on the structural and planning features of the building, installed equipment, etc., but also on the environment, the climatic characteristics of the region in particular the effect of wind. In this regard, the staff of the Educational, scientific and industrial laboratory for aerodynamic and aeroacoustic tests of building structures of the NRU MGSU developed an addition to the existing established algorithms for calculating infiltration using the data of the experimental wind impact study, which is presented in this paper. The publication contains a description of the main stages of the implementation of this type of work.

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Today, the problem of energy efficiency is one of the leading positions in world politics. On the territory of the Russian Federation, a sufficient number of regulatory documents in the construction industry have been developed and put into effect, which regulate the activities of designers and builders in the field of energy efficiency, including in matters of energy losses. However, today this direction is not sufficiently developed: more than 10 % is spent on air heating during infiltration, while the process itself requires the most detailed study. On the basis of scientific and technical literature, the staff of the National Research Moscow State University of Civil Engineering concluded that there is a dependence of air infiltration on the distribution of the velocity of wind flows along the building facades. It was also determined that the calculation of infiltration losses on the methods available to date overstates the results, which leads to large economic losses during construction. In this regard, a study of infiltration losses was carried out using data obtained from experimental studies of wind effects on the construction site. The article presents a brief methodology for carrying out this study, a description of the process of the experiment, as well as a comparison of the data obtained in the calculation according to SP 50.13330.2012, GOST R 55656-2012 and GOST R 55656-2012 with the results of an experimental study.Introduction:the regulatory documents used in the construction industry on the territory of the Russian Federation that regulate the activities of designers and builders in the field of energy efficiency, including in matters of energy losses, are described. An analysis of the technical literature regarding the subject under study is also presented, including issues related to heat losses and infiltration.Methods:methods for calculating infiltration losses according to SP 50.13330.2012, GOST R 55656-2013 and GOST R 55656-2013 are described using data on the aerodynamic characteristics of buildings obtained in the course of experimental studies of wind impact on buildings. A brief algorithm for performing physical modeling of air flow to construction sites, which was developed by the staff of the Educational, Scientific and Production Laboratory for aerodynamic and aeroacoustic testing of building structures of the National Research University MGSU, is presented.Results and discussions:the approbation of this research methodology is presented, and a comparative graph of the calculation results for all three methods is given on the example of a residential complex under construction in Moscow.Conclusion:the conclusion is made about the need to conduct experimental studies of wind impact on construction sites in order to obtain more accurate results of the calculation of infiltration.

Abstract. Using numerical simulation the paper investigates the aerodynamics of extended airport complex; according to the classification of existing regulations the complex is related to buildings and structures of high level of responsibility. We present the technique used for numerical simulation and the results obtained by the application of numerical simulation, the results were verified with the results obtained during physical modelling in wind tunnel of architectural type. According to the results of the research the conclusions about the pattern of flow around the building wind flow were made.