Automated measuring complex (AMC-2) for the spatial - temporal hot - wire anemometric visualization of jet flow field is designed and fabricated. Coordinate device and unit of the measurement, collecting, storage and processing of hot -wire anemometric information were integrated in the AMC-2. Coordinate device is intended for precision movement of the hot - wire probe in jet flow field according to the computer program. At the same time accuracy of the hot - wire probe movement is 5 microns on all three coordinates (x, y, z). Unit of measurement, collecting, storage and processing of hot -wire anemometric infonnation is intended for the hot - wire anemometric measurement of the jet flow field parameters (registration of the mean - U and fluctuation - u' characteristics of jet flow velocity), their accumulation and preservation in the computer memory. In general, after processing of the measurement results according to certain programs, AMC-2 allows to present both qualitative, and quantitative results of the jet low field study in the form of spatial patterns and video clips of the space-time hot - wire anemometric visualization.
В работе представлен набор аппаратно-программных средств, разработанный специалистами ИВТ СО РАН и ИТПМ СО РАН, предназначенный для автоматизации сбора данных и управления высокоскоростным аэродинамическим экспериментом на аэродинамической трубе адиабатического сжатия ИТПМ СО РАН, а также создания АСУ технологическими и научными установками. The paper presents a set of hardware and software developed by specialists of ICT SB RAS and ITAM SB RAS, designed to automate data acquisition and control of a high- aerodynamic experiment on the adiabatic compression wind of ITAM SB RAS, as well as the creation of ACS technological and scientific installations.
Experimental modeling of processes and phenomena in wind tunnels is one of the main research field in modem super- and hypersonic aerodynamics. Effective experiments are impossible to implement without developing new aerodynamic installations and overhauling existing ones by equipping them with modern automation systems designed for scientific research. The authors' task was to provide a researcher with convenient and flexible tool for automating high-speed experimental scientific research in AT-303 (AT-304) and Transit-M hypersonic wind tunnels, which would allow configuring hardware and software to meet the requirements of a particular experiment.
The adiabatic heater which is the part of the working gas source in the hypersonic wind tunnel was tested in dynamic experiments. They were carried out in a special test bench which provided the off-design modes of the heater performance: there was no mechanism of piston motion damping, and the frame was not mounted. The pressures in the receiver, feed pipes, cylinder working capacity and in the capacity of the pushing gas supplier were measured. The temperature in the working capacity was measured, too. The measurement results show the complex interaction of the mutual motion of the pistons and frame. Simulation of this process permits determining its other parameters such as the distance, velocity, acceleration, force, etc.investigations were carried out at different pressures of the pushing gas and piston motion directions.
Macro- and microjets facilities for generation of the round and plane subsonic jets are designed and fabricated. Automated measuring system (AMS - 2) for the spatial - temporal hot - wire anemometric visualization of jet flow field is designed and fabricated. Coordinate device and unit of the measurement, collecting, storage and processing of hot - wire anemometric information were integrated in the AMS. Coordinate device is intended for precision movement of the hot wire probe in jet flow field according to the computer program. At the same time accuracy of the hot - wire probe movement is 5 microns on all three coordinates (x, y, z). Unit of measurement, collecting, storage and processing of hot - wire anemometric information is intended for the hot - wire anemometric measurement of the jet flow field parameters (registration of the mean - U and fluctuation - u' characteristics of jet flow velocity), their accumulation and preservation in the computer memory, and also carries out their processing according to certain programms.
This paper presents the system of synchronization for automated fast gas-dynamic experiments, including the experiments with combustion. The system permits using both super- and hypersonic processes in the pulse mode, the duration ranging from several milliseconds to seconds. Under consideration are individual elements of the system, technique of the fast experiment performance; the developed software is described. The description of the weight test of the model of a small-size high-speed aircraft realized with the present system is presented as an example.
System developed for automated carrying out of hot–wire anemometrical measurements in the aerophysical experiment is presented in the given work. Measurements of the mean (U) and fluctuation (u’) streamwise velocity components, their input in a computer and data processing it is carried out automatically with help of this system. Data processing of the experimental results are carried out by the special program written in MATLAB environment.
The set of the technical means intended for carrying out multichannel measurements of pressure in aerodynamic experiment is presented. These means are developed in common Design Institute for Computer Engineering SB RAS and Institute of Theoretical and Applied Mechanics SB RAS and serve for the automated measurements of pressure in systems of collecting and processing of experimental data. Multichannel measuring instruments of pressure can be used for carrying out high-precision measurements of pressure in various areas of science and equipment.