By William J. Emrich Jr.
Principles of Nuclear Rocket Propulsion offers an figuring out of the actual ideas underlying the layout and operation of nuclear fission-based rocket engines. whereas there are lots of texts on hand describing rocket engine conception and nuclear reactor conception, this is often the 1st booklet to be had describing the mixing of the 2 topic parts. many of the book’s emphasis is totally on nuclear thermal rocket engines, in which the strength of a nuclear reactor is used to warmth a propellant to excessive temperatures after which expel it via a nozzle to provide thrust. different thoughts also are touched upon comparable to a bit dedicated to the nuclear pulse rocket inspiration in which the strength of externally detonated nuclear explosions is used to speed up a spacecraft.
Future crewed area missions past low earth orbit will very likely require propulsion platforms with functionality degrees exceeding that of today’s top chemical engines. a probable candidate for that propulsion procedure is the forged center Nuclear Thermal Rocket or NTR. reliable middle NTR engines are anticipated to have functionality degrees which considerably exceed that available by means of any at the moment achievable chemical engine. The problem is within the engineering information of the layout such as not just the thermal, fluid, and mechanical elements continuously found in chemical rocket engine improvement, but in addition nuclear interactions and a few targeted fabrics restrictions.
- Sorts and organizes info on a number of different types of nuclear thermal rocket engines right into a coherent curriculum
- Includes a few instance difficulties to demonstrate the suggestions being presented
- Features a spouse web site with interactive calculators demonstrating how adaptations within the constituent parameters impact the actual approach being described
- Includes 3D figures that could be scaled and circled to raised visualize the character of the article less than study
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Extra info for Principles of Nuclear Rocket Propulsion
1. SUMMARY While employing Eq. 19) to calculate specific impulse yields a simple means by which rocket engine efficiencies may be estimated, further analyses which examine the degree to which specific impulse impacts the operational characteristics of various interplanetary missions may provide a more useful means to evaluate the performance different rocket engine concepts. To this end, equations are derived, which relate the specific impulse of a rocket engine to the transit time and fuel requirements necessary to accomplish interplanetary missions.
42) plus the limiting planetocentric true anomaly “qN d ” determined from Eq. 44) where qd ¼ angular position of the spacecraft around the departure planet where the departure burn must be initiated. Upon arriving at the destination planet, the patch calculations for insertion in a desired arrival planet parking orbit are essentially the reverse of those described in the preceding paragraphs. Like the equations for planetary departures, these equations relate the velocity and arrival angle of a spacecraft to its radial position with respect to the sun and a central planetary body.
From Eq. 4), therefore, the specific angular momentum can be represented by: p . h . 23) 0 h ¼ rmin V 0 V ¼ 2 rmin Substituting Eq. 23) into Eq. 24) Incorporating the expression for the orbital radius from Eq. 17) into Eq. 25) Examining Eq. 1: From Fig. 1, it can also be observed that rmin ¼ a À εa ¼ a(1 À ε). Using this relationship and Eq. 26) The relationships expressed in Eq. 26) may be used to rewrite the trajectory expression from Eq. 27) ¼ m½˛ cosðfÞ þ 1 ˛ cosðfÞ þ 1 Note that for eccentricities greater than one (eg, hyperbolic trajectories), Eq.