Nozzle Design | Glenn Research Center | NASA
2024年9月12日 · Ramjets and rockets typically use a fixed convergent section followed by a fixed divergent section for the design of the nozzle. This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle.
Nozzle Design - Converging/Diverging (CD) Nozzle - NASA
2021年5月13日 · Ramjets and rockets typically use a fixed convergent section followed by a fixed divergent section for the design of the nozzle. This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle.
In this lesson we will analyze the flow in a converging-diverging (CD) Nozzle. A CD Nozzle is a variable area passage which is used to accelerate gases to higher supersonic speeds. It consists of a converging section with minimum area occurring at a specific location called the throat.
Bell/Contoured Nozzles • Contoured to minimize turning and divergence losses –reducing divergence requires turning flow (more axial) –can result in compressions, could lead to shock losses • Goal is to design nozzle contour such that all waves are isentropic and produce nearly axial flow at exit R t CL E C Nozzle Geometries - 14
• For convergent divergent nozzles – For a given pressure ratio there exists an optimum area ratio that maximizes the thrust coefficient – Right of the optimum is overexpanded • Shock structure is initially outside the nozzle • For larger area ratios shock …
Converging Diverging Nozzle - Virginia Tech
The usual configuration for a converging diverging (CD) nozzle is shown in the figure. Gas flows through the nozzle from a region of high pressure (usually referred to as the chamber) to one of low pressure (referred to as the ambient or tank). The chamber is usually big enough so that any flow velocities here are negligible.
2023年9月26日 · This thesis presents a comprehensive exploration of the design and analysis of a convergent-divergent supersonic nozzle, bridging the gap between traditional nozzle design methodologies and modern computational techniques. A custom-built nozzle design tool, developed in MAT-LAB, serves as the cornerstone of this research.
Design of converging-diverging nozzles with constant-radius
2019年11月15日 · Therefore, this work presents a design approach for a converging-diverging nozzle with constant-radius centerbody. For the nozzle throat, Sauer’s method is modified to include a centerbody. The method of characteristics is …
CFD simulations were performed for a series of four single-stream, axisymmetric, convergent nozzles at nozzle pressure ratios (NPR)—the ratio of nozzle total pressure to ambient static pressure—ranging from 1.4 to 7.0. The nozzle geometries consisted of a reference nozzle, with a circular-arc wall contour,
The axisymmetric convergent-divergent "bell" nozzle that has been used as the example to this point is the standard for rocket nozzles, for several reasons: 1) Structural - It has essentially only "hoop" or tangential