Didac International
Janakpuri, New Delhi, Delhi
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Wind Tunnel Equipments

Leading Manufacturer of blow down wind tunnels, closed circuit wind tunnels, computer controlled subsonic wind tunnel, multi purpose teaching flume, orifice and free jet flow and pipe surge and water hammer apparatus from New Delhi.

Blow Down Wind Tunnels

Blow Down Wind Tunnels
  • Blow Down Wind Tunnels
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Approx. Price: Rs 3 Lakh / Piece(s)

Blow Down Wind Tunnels

Description of Blow Down Wind Tunnels

Blow Down Wind Tunnels are a special type of Open Circuit wind tunnel. For most Open Circuit tunnels, fan assemblies are located downstream of the test section and air is drawn through the wind tunnel with suction. For Blow Down Wind Tunnels, however, air is blown down into the wind tunnel by a fan located upstream of the test section, as the name implies. Compared to standard Open Circuit wind tunnel configuration, blow-down style tunnels provide an extra degree of testing flexibility. Most commonly, these tunnels are used for tests requiring liquid or particulate injection. Because all tunnels are made to fit the customers needs, there is no limitation to the options available. All blow-down style tunnels have custom test sections, and many are requested to include built-in test article mounting arrangements.

Specifications of Blow Down Wind Tunnels

 

  • Airspeed Range: customer-defined
  • Turbulence Level: Because the blower is upstream of the test section, flow quality tends to be lower for blow-down tunnels as compared to traditional open circuit or closed circuit tunnels. Still, every effort is made to provide smooth, consistent test section flow.

 

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  • Item Code: DIWT009
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Closed Circuit Wind Tunnels

Closed Circuit Wind Tunnels
  • Closed Circuit Wind Tunnels
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Approx. Price: Rs 3.4 Lakh / Piece

Closed Circuit Wind Tunnels

Description of Closed Circuit Wind Tunnels

The use of steel for construction offers complete design freedom to meet your unique specifications and needs, such as low overhead clearance or building support columns. Most Closed Circuit Wind Tunnels designs are traditional single-return, horizontally arranged circuits. However, any configuration is possible. As with all wind tunnels, exceptionally steady test section flow with close uniformity of velocity is standard. Turbulence level is typically below 0.10 percent throughout the full tunnel speed range.

Specifications of Closed Circuit Wind Tunnels

 

  • Airspeed Range : customer-defined
  • Turbulence Level: typically < 0.1%
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Computer Controlled Subsonic Wind Tunnel

Computer Controlled Subsonic Wind Tunnel
  • Computer Controlled Subsonic Wind Tunnel
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Approx. Price: Rs 3.35 Lakh / Piece(s)

Since 1990, we are an authentic Computer Controlled Subsonic Wind Tunnel manufacturer, supplier and exporter in West-Delhi (India). It is engineered & developed in conformity with the international standards of quality. Used in several industrial sectors for many uses, this Computer Controlled Subsonic Wind Tunnel is completely inspected prior to make its delivery to clients to provide utmost satisfaction them.


Features:-

  • Computer controlled air flow
  • Transparent working part for visibility
  • 150mm (6" nominal) square working section
  • Broad array of models for aerodynamics as well as air flow studies
  • Selection of electronic or water manometer banks
  • Fast release connectors on manometer tubes & quick release fastenings for convenient model changing


Specification:-

  • Clear acrylic working section (150mm x 150mm x 455mm) for excellent visibility
  • Small computer controlled wind tunnel for undergraduate teaching
  • Inverter controlled AC fan for accurate speed control up to 34m/s air velocity
  • Large spectrum of optional models & instrumentation
  • Single-way or Multi-way fast release connectors between manometers and models.
  • Models mounted in side wall of working section incorporate quick release catches
  • Electronic watchdog allows for remote operation
  • Complete with educational software & data logging.
  • Removable base to working part so as to allow the insertion of complex or large models
  • Flow visualization facility included
  • Air flow studies option available comprising Bernoulli apparatus
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  • Item Code: DIFM18
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Multi Purpose Teaching Flume

Multi Purpose Teaching Flume
  • Multi Purpose Teaching Flume
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Approx. Price: Rs 3 Lakh / Piece(s)

Our company is a renowned Multi Purpose Teaching Flume manufacturer, exporter and supplier at West-Delhi (India). Engineered and developed huge innovation & perfection, this flume is ideally utilized for measuring the velocity of flow. Available in different technical specifications, this Multi Purpose Teaching Flume features outstanding performance, low energy consumption, longer service life, sturdy design and cost-effectiveness.

The is a compact open channel flume that is available in 2.5 m or 5.0 m lengths, with clean acrylic sides to the working part for complete visibility of the flow. The channel is equipped with a PVC inlet tank, and is developed for free discharge into the Hydraulics Bench. The offered flume is mounted on a hard framework, and can be tilted by utilize of a calibrated screw jack that allows exact slope adjustment of the channel.

The inlet tank includes a stilling arrangement to spread the water flow out before to entry into the channel for ensuring smooth uniform flow. The level in the working part of the flume is controlled utilizing an overshot weir at the discharge end.

Bed pressure tappings & fixing points for models are provided. A longitudinal scale set at the top of the channel allows depth gauges & Pitot-static tubes to be precisely located along the channel length.


Specification:

  • Available in 2.5m and 5.0m working section lengths.
  • A 76mm broad, 250mm high open channel for utilize with an Hydraulics Bench.
  • Clear acrylic sides to give visibility of the working section.
  • A jacking system permits the slope of the channel bed to be adjusted between -1% and +3%.
  • Inlet tank with flow stilling arrangement.
  • Comprises a Venturi, sharp and broad crested weirs, two vernier level gauges, adjustable undershot weir & crump weir.
  • Wide range of other models available as accessories.
  • Optional flowmeter.
  • Comprehensive instruction manual.


A set of gauges & models are given with the flume as section of the standard supply, comprising:

  • Venturi flume
  • Crump weir
  • Sharp and broad crested weirs
  • Adjustable undershot weir
  • 2 Vernier level gauges


Technical Details:

  • Channel Dimensions: 2.5 or 5m L x 76mm W x 250mm H Channel slope adjustable between -1% and +3%
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  • Item Code: DIFM41
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Orifice and Free Jet Flow

Orifice and Free Jet Flow
  • Orifice and Free Jet Flow
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Approx. Price: Rs 3.3 Lakh / Piece(s)

In the Orifice and Free Jet Flow accessory a constant head tank is fed with water from the Hydraulics Bench. The orifice is set at the base of the tank through a special wall fitting that provides a flush inside surface.

The head is maintained at a constant value by an adjustable overflow and is indicated by a level scale. A jet trajectory tracing device allows the path followed by the jet to be ascertained.

Specification:

  • Constant head tank with two interchangeable orifice
  • Jet trajectory measured and plotted using adjustable pointers
  • Quick release fitting for easy connection to hydraulics bench
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  • Item Code: DIFM42
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Pipe Surge and Water Hammer Apparatus

Pipe Surge and Water Hammer Apparatus
  • Pipe Surge and Water Hammer Apparatus
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Approx. Price: Rs 3.3 Lakh / Piece(s)

A freestanding unit developed to demonstrate the phenomena of pipe surge & water hammer when connected to a Hydraulics Bench

  • Includes two separate stainless steel test pipes, both 3m long, constant head tank, slow acting valve, fast acting valve etc
  • A transparent surge shaft (40 mm diameter and 800mm high) with scale allows transient water levels to be observed and timed
  • Electronic sensors used to measure pressure transients at two locations in the water hammer test pipe, one adjacent to fast acting valve and one half way along the test pipe.
  • Pressure transients monitored using a PC (not supplied) using a USB connection from the pressure transducers (requires no external electrical supply)
  • Straight metal pipes used, rather than a coiled arrangement, to minimize distortion to the pressure profile


Technical Details:

Test pipes

Stainless steel, 20.2 mm inside diameter, nominally 3 m long

Surge shaft

Clear acrylic, 40 mm inside diameter, 800 mm high

Head tank

PVC, capacity 45 litres

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  • Item Code: DIFM49
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Pitot Tube Demonstrator

Pitot Tube Demonstrator
  • Pitot Tube Demonstrator
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Approx. Price: Rs 3.1 Lakh / Piece(s)

Specification:


  • Pitot tube with scale to determine the position within the pipe diameter
  • Includes pressurised water manometer with scale length 500mm
  • Approximate dimensions 1.0m x 0.55m x 0.23m
  • Set of connecting tubes

Technical Description:

  • The Pitot Tube can be moved across the cross-section of the pipe so as to measure the dynamic head profile. The position of the measuring tip relative to the wall of the pipe can be read on a scale. The Pitot Tube is connected to a pressurized water manometer to measure the differential head across the Pitot tube
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  • Item Code: DIFM50
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Schlieren Systems

Schlieren Systems
  • Schlieren Systems
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Approx. Price: Rs 3.4 Lakh / Piece(s)

Schlieren Systems

Description of Schlieren Systems

Schlieren Systems let you see shock waves as a combination of bright and dark areas. In the study of supersonic flow, shock and expansion waves are used to determine Mach number. In most situations, however, they are virtually invisible to the naked eye. Fortunately, a system developed in 1864 by German Physicist August Toepler allows waves to be viewed clearly for accurate angular measurements. Schlieren are optical in homogeneities in transparent materials. In supersonic flow, air experiences very large changes in density as it approaches, passes through and trails shock waves. As the density of air changes, so does its index of refraction.

Components of Schlieren Systems

 

  • Light source – all-in-one solid state power supply and short-arc xenon lamp with lens, track-mounted adjustable aperture
  • Two telescope-quality parabolic mirrors – frame mounted with fine adjustment knobs
  • Knife edge – adjustable in all three axis and angle of inclination with fine adjustment knobs
  • Plain mirror – first-surface to reflect the image to a convenient viewing location Viewing screen
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  • Item Code: DIWT012
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Subsonic Open Circuit Wind Tunnel

Subsonic Open Circuit Wind Tunnel
  • Subsonic Open Circuit Wind Tunnel
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Approx. Price: Rs 3.5 Lakh / Piece

Sub Sonic Open Circuit Wind Tunnel:

The Sub Sonic Open Circuit Wind Tunnel is simple and safe in operation. It is supplied as a complete self-contained facility mounted on castors for ease of movement. Main equipment comprises the tunnel with a three-component balance system (lift, drag and pitching moment) and an air speed indicator. Air enters the test section through a carefully designed contraction followed by an aluminum honeycomb flow straightener designed to ensure that the flow is steady in both magnitude and direction and has a flat transverse velocity profile. A low angle diffuser at the outlet end contributes to flow stability in the test section. An axial flow fan is located at the outlet of the diffuser section. One number of floor mount 3 component balance for lift force, drag force and pitching moment measurement is installed in the test section.  

 

  • Lift force: 0 to 100 N, sensitivity ±0.01 N
  • Drag Force: 0 to 50 N, sensitivity ±0.01 N
  • Pitching Moment: 0 to 2.4 Nm, sensitivity ±0.001 Nm
  • 24 bit analogue to digital conversion of 3 strain gauge load cells for greater accuracy at low forces.  
  • Forces and moment data are digitally shown on LCD graphic display screen and are able to transfer to computer.  
  • Adjustment of pitch angle of models can be made with the tunnel in operation.  
  • The accuracy of the tunnel and its instrumentation make it suitable for undergraduate and simple research work.

 

Experimental Capability of Sub Sonic Open Circuit Wind Tunnel:

 

  1. Investigation of the development of the Boundary Layer on a flat plate by measurement of the total head distribution.  
  2. Measurement of pressure distribution around an aerofoil at various angles of attack.  
  3. Measurement of pressure distribution around a cylinder.
  4. Measurement of lift and drag on an aerofoil with leading edge slot and trailing edge flap.  
  5. Velocity and pressure distribution measurements using a Pitot static tube and yaw probe.  
  6. Measurement of drag for a selection of models of different shapes but common equatorial diameter.  
  7. Calibration of the Wind Tunnel velocity indicator using a Pitot static tube and inclined manometer.
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Transonic Wind Tunnels

Transonic Wind Tunnels
  • Transonic Wind Tunnels
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Approx. Price: Rs 3.3 Lakh / Piece

Product Details:

BrandDIDAC

Transonic Wind Tunnels

Description of Transonic Wind Tunnels

Using compressed air Transonic Wind Tunnels offer running speeds of M=0.3 to M=1.3. Employing variable test section porosity, computer-controlled valves, chokes and flaps, target airspeeds are easy to achieve and maintain. Systems with test section sizes of 8-inch x 8-inch (20.32cm x 20.32cm) and 20-inch x 20-inch (51cm x 51cm) are available.

Specifications of Transonic Wind Tunnels

  • Nominal Mach Number Range: M=0.3 to M=1.3
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  • Item Code: DIWT013
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Wind Generators

Wind Generators
  • Wind Generators
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Approx. Price: Rs 3.2 Lakh / Piece(s)

Wind Generators

Standard wind generator:

  • Outlet duct dimensions – 5 feet x 5 feet (1.524m x 1.524m)
  • Minimum wind jet centerline height – 66 inches (1.68m)
  • Maximum wind jet centerline height – 126 inches (3.2m)
  • Maximum wind speed at duct exit – 40 mph (64.4 kph)
  • Overall weight – 6,000 lbs. (2,722 kg)
  • Scissors jack power requirements – 110VAC household current
  • Fan motor power requirements – 460VAC, 3-phase, 100A

Specifications

Standard model:

  • Wind jet dimensions – 5 ft x 5 ft (1.524m x 1.524m)
  • Wind speed at duct exit – 40 mph (64.4 kph)
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  • Item Code: DIFM14
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Educational Wind Tunnel

Approx. Price: Rs 3.3 Lakh / Piece

Product Details:

BrandDIDAC

Educational Wind Tunnel

Description of Educational Wind Tunnel

Educational Wind Tunnel (EWT) System is a powerful tool for educators and researchers alike. With many optional features available, the budget-conscious user can start with a basic system and upgrade as needs change or funding becomes available.The Complete Educational Wind Tunnel System is an easy-to-use, all-in-one fluids aerodynamics laboratory. Optional features include instrumentation, data acquisition, models and probes.Perfectly scaled for high school or university use, the basic Educational Wind Tunnel system is also popular with small technical businesses needing an accurate, reliable testing device.

Specifications of Educational Wind Tunnel

  • Airspeed Range – 10 mph to 145+ mph
  • Turbulence Level – less than 0.2%
  • Reynolds Number (per foot) – 1.4 x 10^6 /foot
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  • Item Code: DIWT011
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