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  1. General Definition:
  • An obstruction or partition used in various applications to slow down, divert, or control the flow of gases, liquids, sound, or other materials.
  1. Applications:
  • Fuel Tank: Baffles are used to prevent fuel from sloshing, which helps in maintaining vehicle stability and accurate fuel readings.
  • Crankcase: They help in controlling the oil flow and preventing oil from splashing excessively, which aids in lubrication efficiency.
  • Muffler: In mufflers, baffles are used to divert and slow down exhaust gases, reducing noise and improving exhaust flow.
  • Radiator: They assist in directing coolant flow for more efficient heat dissipation.
  1. Sound Applications:
  • Loudspeakers: Extended surfaces surrounding a diaphragm prevent acoustic short-circuiting, enhancing sound quality.
  1. Fluid Dynamics:
  • Tanks and Containers: Devices or partitions impede or divide fluid flow to reduce sloshing, improve fluid distribution, and control flow rates.
  • Air-Cooled Engines: Plates fitted between cylinders help in directing airflow for better cooling efficiency.
  1. Electrical Applications:
  • Gas-Filled Tubes: Internal structures or electrodes without external connections are used to control the discharge or its decay.
  1. Appliances:
  • Gas, Air, Gas-Air Mixtures, or Flue Gases: Baffles change the direction of or retard the flow to improve efficiency and safety.


Baffles are versatile components used across various systems to manage the flow and distribution of fluids, gases, sound, and heat. Their applications range from automotive fuel tanks and radiators to loudspeakers and gas-filled tubes, highlighting their critical role in improving efficiency, safety, and performance.

See Related Terms:

  • Air Horn Baffle
  • Box baffle
  • Flue gas baffle
  • Load-Bearing Flue Gas Baffle
  • Non-Load-Bearing Flue Gas Baffle
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