Product Details
Equips Thermal Control Materials For Optimal Temperature -
Efficient Energy Storage And Thermal Management With A
Sophisticated Phase Change Mechanism: Phase Change Materials For
Military Aviation
Product introduction:
-- Basic information
- Phase change material (PCM) for military aviation is a kind of
advanced material specially applied in the field of military
aviation, which has many unique and key characteristics and
functions.
- The phase transition temperature is usually set in a specific
range, and near this temperature, the material exhibits a strong
temperature regulation ability.
- When the local temperature of aviation equipment rises to near the
phase transition temperature, it can rapidly absorb a large amount
of latent heat through phase transition, effectively reduce the
temperature of the high temperature area of the equipment, and
prevent key components such as aircraft engines from failing due to
overheating, performance reduction or even damage.
- When the temperature is reduced, the stored heat can be released to
stabilize the operating temperature of the equipment and reduce the
interference of temperature fluctuations on the precision operation
of the equipment.
-- Material type
1. Organic phase change materials
- It has the advantages of wide range of phase transition
temperature, good chemical stability and relatively low cost.
- However, the thermal conductivity of organic phase change materials
is relatively low, and the thermal response rate may be slow.
2. Inorganic phase change materials
- Inorganic phase change materials have high thermal conductivity and
high heat transfer efficiency, but some materials may be corrosive,
and there may be a large volume change during the phase change
process.
3. Composite phase change materials
- Organic and inorganic phase change materials are combined, or phase
change materials are combined with other materials such as fibers,
foams, etc.
- To give full play to the advantages of various materials, overcome
the shortcomings of a single material, improve the performance and
applicability of phase change materials.
Nature of the product:
-- Physical properties
1. Status change feature
- The phase change materials widely used in the field of military
aviation are mostly solid-liquid phase change types.
- When the ambient temperature climbs to a specific phase transition
temperature threshold, the material smoothly transitions from solid
to liquid.
- And when the temperature drops, it can reversibly change from
liquid to solid.
- It is worth emphasizing that in the whole phase transition process
of solid-liquid conversion, the chemical composition and properties
of the material itself remain constant and will not change.
2. Influence of density variation
- When the phase transition phenomenon occurs, the density of the
material is not unchanged, but usually produces a certain amplitude
of fluctuation.
- This dynamic change of density has a significant influence on the
encapsulation of phase change materials and practical application
scenarios.
-- Chemical properties
1. Chemical stability
- Military aviation phase change materials have excellent chemical
stability. In the long cycle, no matter what kind of complex and
harsh environmental conditions, it can effectively resist the
invasion of various chemical reactions such as decomposition,
oxidation and corrosion.
- The lasting stability of the material's own properties reduces the
risk of potential damage to aviation equipment due to the chemical
instability of the material.
2. Material compatibility
- In the application context of aviation equipment, phase change
materials have good compatibility with other types of materials in
the equipment. Whether it is working with metal components, or with
plastic, rubber and other non-metallic materials contact with each
other, reducing adverse interactions.
Product application case:
-- Aircraft landing gear thermal protection
1. Landing gear brake system cooling
- During the landing of the aircraft, the landing gear brake system
will generate a lot of heat, if the heat can not be dissipated in
time, it may lead to the deterioration of the brake system
performance, and even brake failure and other dangerous situations.
- The phase change material is applied to the heat dissipation
structure of the landing gear brake system. During the braking
process, the phase change material absorbs the heat generated by
the brake, reduces the temperature of the brake system, and ensures
the reliability and safety of the brake system.
- At the same time, the heat storage function of phase change
materials can also gradually release the absorbed heat in a period
of time after the aircraft takes off, reducing the impact of heat
on other parts of the aircraft.
2. Thermal protection of landing gear structure
- During high-speed flight and takeoff and landing, the landing gear
will be affected by air friction and aerodynamic heating, which
will increase the temperature of the landing gear structure.
- Adding phase change materials to the structural materials of the
landing gear, or coating the surface of the landing gear containing
phase change materials, can absorb heat in high temperature
environment, reduce the temperature of the landing gear structure,
reduce the thermal stress damage to the landing gear structure, and
extend the service life of the landing gear.
-- Aircraft cabin environmental control
1. Cabin insulation and sound insulation
- The comfort of an aircraft cabin is crucial to the pilot and
passenger experience.
- The application of phase change materials to the inner wall,
ceiling and floor of the cabin can play a role in heat and sound
insulation.
- In high temperature environments, phase change materials absorb
heat and reduce the temperature inside the cabin. At low
temperatures, phase change materials release heat and maintain the
temperature inside the cabin.
- At the same time, the porous structure or multi-layer structure of
the phase change material can also absorb the noise in the cabin
and improve the quietness of the cabin.
2. Cabin air conditioning system assistance
- The aircraft's cabin air conditioning system consumes a lot of
energy to maintain the temperature and humidity in the cabin.
- By combining phase change materials with cabin air conditioning
system, the heat storage and heat release functions of phase change
materials can be utilized to reduce the energy consumption of air
conditioning system.
- For example, before the aircraft takes off, the phase change
material is heated or cooled to the appropriate temperature, and
during the flight, the phase change material automatically releases
or absorbs heat according to the temperature change in the cockpit,
and the auxiliary air conditioning system maintains the temperature
stability in the cockpit.