Performance indicators and components of icing simulation system

1. Overall system composition

Ice simulation system

It includes spray system, flight speed simulation system and electrical system.

Spray system

Produce frozen clouds and mist with a certain diameter and content of liquid water.

Flight speed simulation system

Simulating icing test by driving a fan to generate a certain flow of circulating air

Flight Mach number, after the icing cloud is ejected from the spray system and the flight speed simulation system

The generated circulating air is blown towards the specimen together.

electrical system

Control the electrical components in the spray system and flight speed simulation system.

The spray system, flight speed simulation system and electrical system are arranged in the test room.

All testing and control signals communicate with the control system in the control room through the network.

2. Main technical indicators

According to the typical icing state points of the test piece, the main technical indicators of the icing simulation system are as follows:

1. Maximum circulating air flow rate: ≥ 200kg/s (including 25kg/s of gas supply);

2. Boosting ability of the driving fan: ≥ 10kPa (ground atmospheric pressure);

3. Maximum diameter of the inlet nozzle in the experimental section: 1.3m;

4. Maximum flow velocity of the test section nozzle: 80m/s;

5. Liquid water content of spray (LWC): (0.2~3) g/m 3;

6. Average diameter of spray droplets (MVD): (15 ～ 55) μ m;

7. Control accuracy of liquid water content: ± 10%;

8. Control accuracy of average diameter of water droplets: ± 5um;

9. Uneven cloud and mist: ≤ ± 20%.

3. Following standards

The standards and specifications that system manufacturing should follow:

1. Design Specification for Aircraft Engine Test Stand (GB 50454-2008);

2. Industrial Enterprise Boundary Noise Standard (GB 12348-2008);

3. Design Code for Industrial Metallic Piping (GB 50316-2000);

4. Code for Construction and Acceptance of Industrial Metal Pipeline Engineering (GB 50235-2010);

5. Design Code for Integrated Cabling System Engineering (GB 50311-2016);

6. Code for Design of Low Voltage Power Distribution (GB 50054-2011);

7. Design Code for Distribution of General Electrical Equipment (GB 50055-2011);

8. Design and Verification Criteria for Wind Tunnel Control Systems (GJB 5221-2004);

9. Quality Specification for Flow Fields in High Speed Wind Tunnels and Low Speed Wind Tunnels (GJB 1179A-2012);

10. Non destructive Testing of Pressure Equipment JB/T 4730-2005;

11. Stainless Steel Welded Steel Pipes for Fluid Transport GB/T 12771;

12. "Convex Welding Steel Pipe Flanges" GB/T 9115-2010;

13. "Metal coated gaskets for pipe flanges" GB/T 15601-2013;

14. Saddle Support JB/T 4712.

4. Usage environment and conditions

1. Working medium: air and low-temperature air;

2. Environmental temperature range: -35 ℃ to room temperature;

3. Working pressure of the test section: (35-130) kPa (absolute pressure);

4. Environmental humidity: Maximum 100% RH, working in a liquid water environment for a long time;

5. Installation conditions: Indoor, temperature range 0-35 ℃;

6. Power supply conditions: Three circuits of high voltage 10kV power supply, with powers of 1500kW, 1440kW, and 1440kW respectively; Low voltage power supply

380V, 7. Total power 1600kW, distribution cabinet configured with 1000kW, 800kW, 400kW, 250kW, 100kW and

Six circuits, including 50kW, with a frequency of 50Hz ± 2%;

8. Cooling circulating water conditions: Two supply and return water interfaces have been reserved, both of which are DN300, with a total circulating water flow rate of not less than 500t/h.

5 spray system

Main components of spray system

Including water supply subsystem, atomizing air subsystem, control subsystem, spray device (section)

Carrying platform, testing equipment, etc.

Water supply subsystem

Function: to provide pure water for the spray section. The water source of the water supply system is connected to tap water, through coarse filtration and fine filtration

Desalination, ionization and other treatments are carried out to reduce the electrical resistivity of water to above 10M Ω· cm, and a load-bearing platform is arranged.

Principle: The tap water provided by Party A is purified by a pure water machine and stored in a water tank

Pure water is pressurized by a pipeline pump, and the water supply flow and pressure are adjusted by an electric regulating valve. The pipeline is equipped with

Buffer stabilizing device to maintain stable water supply pressure; To ensure that the nozzle is not blocked or frozen, it has a heating temperature

Ability.

Functional parameters:

1. Purified pure water has a resistivity of over 10M Ω· cm and no hardness;

2. The single spray time is ≥ 76min, the water capacity of the pure water machine is 0.5t/h, the volume of the water tank is 2000L, and the water tank is equipped with a level gauge;

3. The water supply pressure should be adjustable within the range of (0.1-0.5) MPa;

4. Ability to heat up to a temperature rise of ≥ 30 ℃ at maximum pure water flow rate;

5. Be able to measure the water flow, temperature and pressure supplied to the spray section.

Function: provide atomizing air for the spray system, and blow dry the pipeline and nozzle after the spray stops. The simulated environment icing device simulates the icing conditions by atomizing gas and water in a gas-liquid two-phase nozzle in a natural low-temperature environment. In order to prevent liquid from freezing in low-temperature pipelines or nozzles and avoid damage to the test object after ice falls off, heated water and air are required to be arranged on the bearing platform.

Principle: Connect the ambient temperature compressed air provided by Party A to the atomization air subsystem, adjust the flow and pressure of the compressed air through an electric valve, and install a filter to ensure clean output air.