A nozzle assembly comprising: a nozzle housing; and a nozzle comprising: a first nozzle part defining a central nozzle axis (X-X) and having a fluid outlet at a first end and a fluid inlet at an opposed, second end; a second nozzle part coaxial with the first nozzle part and surrounding at least a first portion of the first nozzle part; and a third nozzle part coaxial with the first part, wherein a first portion of the third nozzle part surrounds a first portion of the second nozzle part, and a second portion of the third nozzle part is attached to a second portion of the first nozzle part; wherein: the first portion of the first nozzle part is interference fitted within the second nozzle part; the first portion of the third nozzle part is interference fitted with the first portion of the second nozzle part; a second portion of the second nozzle part is received with an interference fit within the housing; the first nozzle part and third nozzle part are made of materials having approximately the same first coefficient of thermal expansion (TE 1); the nozzle housing and the second nozzle part are made of materials having approximately the same second coefficient of thermal expansion (TE 2); and the first coefficient of thermal expansion (TE 1) is different from the second coefficient of thermal expansion (TE 2). a nozzle housing; and a nozzle comprising: a first nozzle part defining a central nozzle axis (X-X) and having a fluid outlet at a first end and a fluid inlet at an opposed, second end; a second nozzle part coaxial with the first nozzle part and surrounding at least a first portion of the first nozzle part; and a third nozzle part coaxial with the first part, wherein a first portion of the third nozzle part surrounds a first portion of the second nozzle part, and a second portion of the third nozzle part is attached to a second portion of the first nozzle part; wherein: the first portion of the first nozzle part is interference fitted within the second nozzle part; the first portion of the third nozzle part is interference fitted with the first portion of the second nozzle part; a second portion of the second nozzle part is received with an interference fit within the housing; the first nozzle part and third nozzle part are made of materials having approximately the same first coefficient of thermal expansion (TE 1); the nozzle housing and the second nozzle part are made of materials having approximately the same second coefficient of thermal expansion (TE 2); and the first coefficient of thermal expansion (TE 1) is different from the second coefficient of thermal expansion (TE 2). a first nozzle part defining a central nozzle axis (X-X) and having a fluid outlet at a first end and a fluid inlet at an opposed, second end; a second nozzle part coaxial with the first nozzle part and surrounding at least a first portion of the first nozzle part; and a third nozzle part coaxial with the first part, wherein a first portion of the third nozzle part surrounds a first portion of the second nozzle part, and a second portion of the third nozzle part is attached to a second portion of the first nozzle part; wherein: the first portion of the first nozzle part is interference fitted within the second nozzle part; the first portion of the third nozzle part is interference fitted with the first portion of the second nozzle part; a second portion of the second nozzle part is received with an interference fit within the housing; the first nozzle part and third nozzle part are made of materials having approximately the same first coefficient of thermal expansion (TE 1); the nozzle housing and the second nozzle part are made of materials having approximately the same second coefficient of thermal expansion (TE 2); and the first coefficient of thermal expansion (TE 1) is different from the second coefficient of thermal expansion (TE 2). the first portion of the first nozzle part is interference fitted within the second nozzle part; the first portion of the third nozzle part is interference fitted with the first portion of the second nozzle part; a second portion of the second nozzle part is received with an interference fit within the housing; the first nozzle part and third nozzle part are made of materials having approximately the same first coefficient of thermal expansion (TE 1); the nozzle housing and the second nozzle part are made of materials having approximately the same second coefficient of thermal expansion (TE 2); and the first coefficient of thermal expansion (TE 1) is different from the second coefficient of thermal expansion (TE 2).