SU1354043A1 - Bed for heat engineering and aerodynamic tests of heat-exchanging surfaces - Google Patents

Abstract

The invention makes it possible to improve the accuracy of test results and reliability. For this purpose, a simulator 11 of aerodynamic resistance of working model 7 is installed between plates 1 and 2 in the zone between holes 3 and 5. Nozzles 8 and 9 are connected to a drive 10 of reciprocating motion and mounted to move along its plate from one hole to another. This stand design reduces the dynamic loads on the working model and stabilizes the coolant flow through the simulator 11 before and after moving the nozzles 8 and 9. The interruption of the compressed air supply makes it easy to move the nozzles 8 and 9, 3 or less. ate 00 ate. about 4 00

Description

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The invention relates to heat engineering and can be used in devices for heat engineering and aerodynamic testing of heat transfer surfaces.

The aim of the invention is to improve the accuracy of test results and reliability by reducing the dynamic loads on the working model and stabilizing the flow rate of the coolant.

FIG. 1 shows the stand, a general view, in Fig. 2 - the same, a horizontal section; in Fig. 3 a seal of the pipes.

The stand contains two plates placed parallel to one another and 1 and 2, respectively, with a pair of holes 3 and 4, as well as 5 and 6 in each, arranged coaxially with the holes of the other plate, and between plates 1 and 2 in the zone between holes 4 and 6 installed working model 7 heat exchange surface. The stand also contains two nozzles 8 and 9, each of which is connected from the outside by a corresponding plate 1 and 2 to an opening diagonally located relative to the opening

with the pipe of another plate, as well as at-30, the accuracy of measurements and reliable 10 of the reciprocating movement and the aerodynamic resistance simulator 11 of working model 7 installed between plates 1 and 2 in the zone between holes 3 and 5, and the pipes 8 and 9 are connected to a reciprocating actuator 10 and are mounted for movement along their plate (1 or 2) from one hole to another.

The stand is also provided with paths 12 and 13, respectively, of hot and cold air, connected to nozzles 8 and 9 by means of flexible corrugated sleeves 14. Nozzles 8 and 9 are equipped with movable supports 15 placed on rails 16. In plates 1 and 2, they are heated in holes 3 through 6, seals 17 are made in the form of annular grooves, hermetically sealed outside by an elastic material with the formation of a cavity communicated with a compressed air supply system (not shown). Working model 7

stand stand.

Claims (1)

Invention Formula 35 Stand for heat engineering and aerodynamic testing of heat exchangers. surfaces, containing two parallel plates placed one against another plate with a pair of holes in each, located coaxially with the holes of the other plate, with a working model of the heat-exchange surface fixed between the plates in the zone between the holes, and two 45 nozzles, each of which is connected on the Outside of the corresponding plate to a hole diagonally located relative to the hole with the nozzle of another plate, as well as a reciprocating actuator that differs test results and reliability by reducing the dynamic loads equipped with sensors 18 and 19 temperature-gg & a working model and stabilizing the flow and pressure, respectively. the course of the coolant, it additionally Stand works as follows. It contains an aerodynamic simulator. According to the paths 12 and 13, the corresponding resistance of the working model is supplied, which is permanently hot and cold, created between the plates in the zone between the arms. In the initial working position (figure 1) the pipe 8 of the heated air. Xa is installed opposite the opening 4 coaxially with the working model 7 heated by hot air. Subtubes 9 are installed opposite the opening 5 coaxially with the simulator 11 aerodynamic drag. After the working model 7 is fully warmed up by means of a drive 10 for reciprocating movement, the nozzle 8 is installed opposite the opening 3, and the nozzle 9 opposite the opening 6 (Fig. 2). At the time of movement of the nozzles 8 and 9, the supply of compressed air to the seals 17 is stopped, which makes it easy to move the nozzles 8 and 9. The sensors 18 and 19 of the temperature and pressure measure the parameters of the air flow, which are processed by known methods. The proposed device eliminates the impact on the working model 7 of shock mechanical loads and stabilizes the air flow with the help of a simulator 11 before and after moving the nozzles 8 and 9, which improves the measurement accuracy and reliability. stand stand. Invention Formula A bench for heat engineering and aerodynamic testing of heat transfer surfaces, containing two parallel plates placed one against the other with a pair of holes each spaced coaxially with the holes of another plate, with a working model of the heat exchange surface fixed between the plates and two a pipe, each of which is connected on the Outside of the corresponding plate to a hole diagonally located relative to the hole with the pipe of another plate, as well as a reciprocating drive that differs 31354043 the holes, and the nozzles are connected with the possibility of moving along with the said drive with a positive-facing plate from one hole to the obtuse movement and mounted to the other. ten / ( 1 .Xxxxchhch Compiled by G. Savvatisky Editor A. Shandor. Tehred L. Serdyukova Order 5684/36 Edition 776 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fig.Z Proofreader S. Shekmar