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  2. Head (vessel) - Wikipedia

    en.wikipedia.org/wiki/Head_(Vessel)

    Korbbogen head. This is a torispherical head also named Semi ellipsoidal head (According to DIN 28013). The radius of the dish is 80% of the diameter of the cylinder ( ). The radius of the knuckle is ( ). Also other sizes are , rest of height ( ) . This shape [6] finds its origin in architecture; see Korbbogen, architectural information.

  3. Hemispherical combustion chamber - Wikipedia

    en.wikipedia.org/wiki/Hemispherical_combustion...

    A hemispherical combustion chamber, displaying the largest single intake and exhaust valves possible for a given engine bore diameter. A hemispherical combustion chamber is a combustion chamber in the cylinder head of an internal combustion engine with a domed "hemispheric" shape. An engine featuring this type of hemispherical chamber is known ...

  4. Pressure vessel - Wikipedia

    en.wikipedia.org/wiki/Pressure_vessel

    Pressure vessels can theoretically be almost any shape, but shapes made of sections of spheres, cylinders, and cones are usually employed. A common design is a cylinder with end caps called heads. Head shapes are frequently either hemispherical or dished (torispherical).

  5. Cylinder stress - Wikipedia

    en.wikipedia.org/wiki/Cylinder_stress

    Cylinder stress. In mechanics, a cylinder stress is a stress distribution with rotational symmetry; that is, which remains unchanged if the stressed object is rotated about some fixed axis. Cylinder stress patterns include: circumferential stress, or hoop stress, a normal stress in the tangential (azimuth) direction.

  6. Reactor pressure vessel - Wikipedia

    en.wikipedia.org/wiki/Reactor_pressure_vessel

    Reactor pressure vessel. The reactor vessel used in the first US commercial nuclear power plant, the Shippingport Atomic Power Station. Photo from 1956. A reactor pressure vessel (RPV) in a nuclear power plant is the pressure vessel containing the nuclear reactor coolant, core shroud, and the reactor core .

  7. Hemifacial spasm - Wikipedia

    en.wikipedia.org/wiki/Hemifacial_spasm

    Hemifacial spasm (HFS) is a rare neuromuscular disease characterized by irregular, involuntary muscle contractions on one side (hemi-) of the face (-facial). [1] The facial muscles are controlled by the facial nerve (seventh cranial nerve), which originates at the brainstem and exits the skull below the ear where it separates into five main branches.

  8. Saxton Nuclear Generating Station - Wikipedia

    en.wikipedia.org/wiki/Saxton_Nuclear_Generating...

    The steel containment vessel was a right cylinder topped by a hemispherical dome with an embedded semi-hemispherical lower head. The containment vessel was 109 feet tall by 50 feet in diameter. To provide radiological shielding and protection from environmental hazards, approximately 50 percent of the structure was below the surrounding grade ...

  9. Pent-roof combustion chamber - Wikipedia

    en.wikipedia.org/wiki/Pent-roof_combustion_chamber

    Pent-roof combustion chamber. Cylinder head of the Nissan VQ35DE engine. In engine design, the penta engine (or penta head) is an arrangement of the upper portion of the cylinder and valves that is common in engines using four valves per cylinder. [1] Among the advantages is a faster burn time of the air-fuel mix. [2]